FOR SALE

Quality Test Instruments for Technicians or Hobbyists

*Free standard shipping for all test equipment and accessories on this page.

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Rigol DS-1052E 50-Mhz Digital Oscilloscope, virtually brand new (less than 20 hrs of use), perfect new condition — $279 free ship

Basically brand-new — less than 20 hours of use. Includes original boxes, paperwork, probes. Automates measurements (such as rise time, Vpp, Vrms, frequency, etc.).

You can read the factory specifications webpage [HERE].

Price is a steal for essentially a brand new Digital Oscilloscope. Street price is $350 at Tequipment.

Dave at EEVblog has reviewed this model, and has 2 videos you can watch if you are not familiar with the Rigol DS-1052E.
Review video #1 can be downloaded [HERE].
Teardown video can be downloaded [HERE].

Rigol DS-1052E oscilloscope $279 free ship USA

Elenco GF800555 Low Distortion Sine/Square Wave Audio Generator (20Hz – 150kHz), like-new, $48 free ship USA.

Basically brand-new condition, less than 3 months old. Includes original box.

Great for audio amp testing because of its extremely low distortion levels in the heart of the audio freq range — 200Hz – 15kHz <0.05%.

Manual can be downloaded [HERE].

Elenco Audio Oscillator $48 free ship USA

testing 6L6 calibration tube

very nice Jackson 648 Tube Tester — $399 free ship

Really nice condition is this professional Jackson 648 dynamic tube tester. Includes my remastered copy of the original Jackson 648 paperwork with several chart supplements.

Professionally calibrated (both Line calibration and plate current calibration, checked against my calibration tubes), upgraded to solid-state Line control, shorts-leakage sensitivity increased to a very sensitive 2 megohms, all socket pins hand-polished for perfect continuity, plate potentiometer and all switches & controls treated with deoxit.  New top-cap and top-cap lead.  Meter protection diodes installed.  This model has the headphone jacks for noise-test capability (headphones not included).

Proud buyer will want to keep this for a lifetime. You can’t go wrong with a Jackson, serious quality and extreme reliability.

testing 5AR4 rectifier

testing weak calibration tube

Jackson 648 tube tester $399 free ship USA

testing 6L6 calibration tube

Jackson 598 Dynamic Conductance tube tester — $250 free ship USA

Serviced and calibrated is this Jackson 598 dynamic conductance tube tester. Very similar circuitry to 648-series, with consistent/comparable test results.

Works great. Price reduced because the cosmetic condition does not meet my high standards, therefore price is lower than it otherwise would be. Test sockets are: 4-pin, 5-pin, 6-pin, 7-pin-min, octal, loctal, 9-pin-min. All switches and controls treated with DeOxit. All socket pins individually cleaned and shine like-new. Use instructions are conveniently printed inside the case lid, which also contains a supplement setup chart for obsolete tube types (such as 6N6).

Roll chart and/or supplement contains test data for many popular tube types, such as 6L6, 6550, 6CA7, 6CA4, 6SN7, 12AX7, 6EU7, 6973, 7027, 7355, 7247, 5687, 7199, 7591, 2a3, #10, #45, #50, #71A, #80, #83, etc.

Smart buy for the low price, and free shipping also!

testing 5AR4 rectifier

testing weak calibration tube

Jackson 598 tube tester $250 free ship USA

gorgeous B&K 747B tube tester – $259 free ship AS-IS

Here is a gorgeous original B&K 747B mutual conductance tube tester. This is a very modern version of the 747B, possibly the last version made. Cosmetically it is absolutely beautiful, which is why I accepted it in trade. Cabinet is excellent and has the better design with a number of machine screw taps for many of the mounts — not the cheap “all self-tappers” that you see on the earlier 747′s.

Previous owner did recapping and some level of servicing, including soldering the ALC bulbs into the circuit. Time is a precious commodity these days, so I am selling this machine unserviced by me, selling AS-IS. I did test the panel meter for good full-scale sensitivity and smooth action, and I tested the transformer, and both of those major components are fine. I did notice that the shorts light comes on occasionally when you press the shorts test button, therefore the machine requires some servicing and/or calibration. Photo shows testing 6L6 calibration tube (tube not included).

If you have been looking for an absolutely gorgeous-looking & clean 747B, then this is your meal ticket. Again, this machine has not been serviced by me and does not have a warranty.  I took it in on trade and selling it as found.

BK 747B tube tester AS-IS NO WARRANTY $259 free ship USA

Hickok 800 mutual conductance tube tester

Hickok 800 Mutual Conductance Tube Tester with custom TubeSound plate current meter upgrade, serviced and calibrated – $649 free shipping

Here is a quality Hickok 800 Mutual Conductance Tube Tester with custom TubeSound plate current meter upgrade.

Very nice/clean front panel. Legendary Hickok quality.


Servicing consisted of:

• performing our custom TubeSound plate current meter upgrade to Hickok 800 series, in which I re-purpose the (+)(-) rectifier test jacks on the front panel for use with a DMM to read the tube’s plate current. This is a much more useful purpose for those jacks in my opinion. Any modern DMM with DC millivolts functionality can be used for this purpose. I am including a brand new budget DMM, for free, that is suitable for this task, but you can use a Fluke or Gossen Metrawatt or similar if you prefer. For maximum flexibility, this tube tester can be used with, or without, connecting the DMM. And to accommodate any future “purists”, my upgrade is easily reversible by any competent technician since I make no modifications to the front panel nor drill any holes.
• eliminated #83 vacuum tube and upgraded to solid-state #83 with plate winding protection
• line calibration performed and accommodates typical mains voltages (approx 110-125 vac)
• mutual conductance calibration checked
• shorts/leakage calibration checked for excellent accuracy
• calibration checked for Diode tube test, rectifier tube test, and 0Z4 tube test
• all resistors checked, capacitors replaced
• meter protection diodes installed
• all pots, switches, and controls cleaned with deoxit
• all socket pins hand-cleaned for perfect continuity
• brand new 3-wire grounded line cord installed
• brand new rubber feet installed on bottom of case
• careful cleaning inside and out
• includes a copy of our TubeSound remastered paperwork for Hickok 800
• additional PDF’s will be emailed to buyer
• 8 built-in sockets from antique 4-pin through 9-pin-miniature. Model 800 will also accommodate Hickok CA-4 socket panel to allow testing a number of compactron/magnoval/novar tubes. (Adapter panel not included). The installed Spring 1972 roll chart is very modern and has setup data for many of those compactron/magnoval/novar tubes.
• wood case is original and pretty decent condition (some scratches and scuffs, as to be expected for original)

testing 6L6 calibration tube

testing weak calibration tube

Hickok 800 tube tester $649 free shipping

B&K 700 Mutual Conductance Tube Tester with custom Gm plate current meter upgrade – $399 free ship.

Diligently serviced, calibration set and tweaked for best accuracy in testing of 6L6 calibration tube.

Servicing consisted of: installation of new DMM for plate current measurements during Gm tests, the pins in all 42 sockets have been individually cleaned for excellent continuity and shine close to new, #83 tube eliminated and upgraded to solid-state with fused secondary to better protect transformer plate current winding, ALC bulbs soldered into the circuit to avoid ALC continuity issues, remastered reprint on heavy cardstock of the tube setup chart, all pots treated with deoxit, most caps replaced with fresh new inventory, and bad resistors were replaced with fresh 5% inventory, new top cap, new rubber feet installed on cabinet base. A copy of the BK 707 use instructions will be included since it is pretty much the same machine. Photo shows accurate testing of my 6L6 calibration tube (tube not included).

BK 700 tube tester with DMM plate current meter upgrade $399 free ship USA

testing new 5881 on the Gm scale (not the Red-Green scale)

B&K 500 mutual conductance tube tester — $179 free ship

Includes our TubeSound remastered paperwork package with newest setup chart.

This is the last BK 500 in my current collection. I gave this B&K 500 mutual conductance tube tester a basic level of servicing, not the meticulous level of servicing that I do on most of my tube testers.

Servicing consisted of:
- all new capacitors
- all socket pins individually cleaned & polished
- results checked for reasonableness against my calibration tubes
- all switches and control pots treated with Deoxit
- basic cleaning of case and front panel
- this model uses the 6AX5GT rectifier tube

That’s still a lot more work than most vendors will do, but far less than I do on my premium repair jobs.

Priced to sell, and for this very low price, I am not extending any warranty.

BK 500 tube tester $179 free ship USA sold without warranty

Paco G-34 Audio Generator

rebuilt Precision Apparatus G-34 Audio Sine & Square Wave Generator – $149 free ship

Here is a beautiful audio generator — the PACO (Precision Apparatus Co) model G-34. If you are looking for a vintage tube-type audio generator that does both sine & square waves, this is awesome choice.  It generates Sine & Square waves, frequency approx 7hz to 750Khz. Output 0-10 vrms, 600-ohm. Rated distortion is listed in the manual as less than 0.25% from 20 to 20khz. Square wave duty cycle 50-50 (although you can adjust if you have a need), and rise time listed as 150 nanoseconds. Output attenuator goes down to -60db.

Massive rebuild, which included upgrading to BNC output jacks, almost every resistor upgraded to new metal film or carbon film, new capacitors, calibration set approx a year ago. New grounded line cord installed (for some uses, you may need to float the ground with an adapter plug). No cables included but easily obtainable anywhere standard BNC cables are sold. Copy of use instructions will be included.

Photos below show the unit (extremely clean and attractive), and the sine wave on my scope (hard to photograph with my camera, I took the best photo that I could… scope not included obviously…). Dimensions are approx 14W x 9H x 8D.

Paco G-34 generator -- $149 free ship USA

Heathkit IT-11 Capacitor Checker

professional Heathkit IT-11 Capacitor Checker, up to 600v leakage test voltage, rebuilt & calibrated – $279 free ship USA

This is a fabulous test instrument. Here is one of the finest capacitor checkers you can buy — a professional Heathkit IT-11, rebuilt & calibrated. This unit tests capacitors out-of-circuit. Do not buy this if you are not a technician with the skills to use it. Excellent original cosmetic condition. Leakage test voltage (nominal) selectable: 3v, 6v, 10v, 15v, 25v, 50v, 100v, 150v, 200v, 250v, 300v, 350v, 400v, 450v, 500v, 600v.  Leakage calibration set according to manual: 2uA for paper, 15uA for miniature electrolytic, 2ma for standard electrolytic.

This unit also has the capability to test a capacitor at different frequencies (other than the built-in 60-hz generator) by using your external audio generator (capable of 2v output), frequency can be up to 10-khz.

Capacitance test from 10pf up to 1000uf. Resistance test from 5 ohms to 50 megohms.

Rebuild consisted of replacing all paper & electrolytic caps, installing 1% or better precision bridge reference capacitors (including variable 200pf cap for best accuracy), upgrading power supply to solid-state technology, 600v range adjusted for best accuracy at common line voltage, cleaning all switches & pots with Deoxit, installing 3-wire grounded line cord, thorough testing of features for accuracy & performance, standard cleaning inside & out, brand new alligator test leads with soldered connectors. Magic eye tube has excellent brightness.

Photos show the phenomenal accuracy and quality of the test instrument you are buying. Test capacitors and Fluke meter are shown for demonstration purposes only and not part of this sale.

testing 2.00uf capacitor

testing 0.02uf capacitor

testing 200pf capacitor

testing 200 ohms

testing 450v electrolytic with no leakage

testing 450v electrolytic with excess leakage

Leakage test voltage up to 600v

Heathkit IT-11 Capacitor Checker -- $279 free ship USA



Sylvania 620 professional Tube Tester, serviced and calibrated – $309 free shipping

Here is a Sylvania 620 tube tester, it has really clean front panel! You can tell that this machine was built by an actual tube manufacturer; it speaks of strong build quality inside and out. Large beefy transformer, quality test method (similar to a Jackson), separate tests for shorts-leakage and gas. Sylvania describes the test method as “Composite transconductance and Emission”, and seems very reliable in my opinion. I would not hesitate to make a Sylvania my “go-to” tester. Model 620 also has special circuitry for more reliable setup configuration of 600ma filament tubes (such as 6BN8, for example).

Sylvania 620 tube tester $309 free shipping

Servicing consisted of replacing most carbon resistors with new, calibration of Line-shorts-gas-emission-600ma, new 3-wire grounded line cord, cleaning all controls, switches, sockets, and pots with Deoxit.

A remastered copy of my Sylvania 620 paperwork will be included.

testing Sylvania calibration tube

testing weak calibration tube

testing NOS 6BQ5

B&K 747B mutual conductance tube tester

professional B&K 747B Mutual conductance tube tester – $469 free ship

Rebuilt & calibrated is this professional B&K 747 dynamic mutual conductance tube tester — actually, this is the newer 747B version. B&K “latest & greatest” mutual conductance tube tester! Completely solid-state — no tubes inside.  Grid leakage sensitivity of 100 megohms.  Amplifier tubes tested for dynamic mutual conductance.  Automatic line voltage compensation.  Set of four built-in pin straighteners for 7-pin-miniature, 9-pin-miniature, novar, and duodecar compactrons.

Rebuilding consisted of replacing capacitors, checking & replacing resistors, soldering the ALC bulbs directly into the circuit for best stability, cleaning all switches & pots with Deoxit, and performing calibration procedure & tweaking for best accuracy in testing my set of calibration tubes. I am also including a reprint of the owner’s manual. Original setup chart included. Like all B&K tube testers, this tester does not have any “antique” sockets, and therefore does not test any tube with less than 7-pins except for nuvistors.  It does test modern compactron tubes, such as 6LQ6, 6KD6, 6JS6C, 6LR6, 6LB6, etc… for mutual conductance.  Photo shows accurate testing of 6L6 calibration tube (tube not included).

Testing 6L6 calibration tube

BK 747B Tube Tester - $469 free ship

testing 2.00uf precision cap

Sprague TO-4 Tel-Ohmike Capacitor Tester (R/C Bridge), recapped & cleaned — $185 free ship USA

Here is a beautiful-clean Sprague TO-4 Capacitor tester bridge. Applies variable high voltage, up to 600 volts, to capacitor under test during leakage testing.

This beautiful unit was being partially serviced by a previous owner before I took it in on trade. All I did was install precision caps in the bridge balance circuitry, installed a new grounded line cord, and replaced a few resistors that he had not replaced. The unit is now recapped (including precision caps in the bridge) and also a majority of resistors have been replaced with new. Magic eye tube is very bright. Includes remastered TubeSound copy of owner’s manual.  Leather handle was removed by previous owner.  Metal cabinet and faceplate are beautiful.

Photos show accurate capacitance testing on the three primary cap ranges, and the 4th photo shows leakage testing of a leaky electrolytic cap. I have not re-calibrated the leakage or insulation test circuits.

This is a beautiful test instrument. Since I have not done a meticulous “hero” calibration job on it, no warranty is being offered. No test leads included, but all you need is a pair of alligator wires.

testing 0.02uf precision cap

testing 200pf precision cap

testing leakage

Sprague TO4 cap tester $185 free ship USA no warranty extended

Eico 666 dynamic conductance tube tester

Eico 666 Dynamic Conductance tube tester with custom TubeSound digital plate current meter upgrade- $375 free ship

The Eico 666/667 series of tube tester is a very well-designed, professional-grade, tube testing instrument. The machine offers selectable & separate test voltages to be applied to each tube element individually, and the meter represents the tube’s plate current (which can exceed 150ma in some configurations). I have also installed a new DMM digital plate current meter to make reading the plate current much easier than referring to the charts in the instrument manual.

Plate voltage options: 45v, 90v, 180v. Screen voltage options: 15v, 45v, 90v, grid voltage 0 to 45. Very sensitive leakage test (0 to 20 megohms). A complete series of lockouts permit the best type of shorts test to be incorporated into this tester (eliminating false shorts issues). Solid-state line for best stability. Test sockets from the early 4-pin socket up through 9-pin-miniature.

Complete service job consisted of checking all resistors for proper spec, replacing all capacitors, meticulous cleaning of all switches, sockets, and pots, calibration, installing new 3-wire grounded line cord, and installing our custom digital plate current meter upgrade.

This is an excellent test instrument if you take the time to really learn how to use it. Highly recommended. A copy of the manual will be included, and additional information will be supplied via email PDF.

Testing 6L6 calibration tube

Testing weak calibration tube

Eico 666 Tube Tester with plate current meter upgrade - $375 free ship

Signal Corp I-177-B tube tester made by Simpson

Signal Corp I-177-B tube tester, manufactured by Simpson, serviced & calibrated, $449 free ship USA.

Here is a very nice Signal Corp I-177-B mutual conductance tube tester, serviced & calibrated. This unit was built by Simpson. Servicing consisted of replacing the #83 tube with a solid-state upgrade, cleaning all pots, switches, controls with Deoxit. Socket pins cleaned and shine very close to when new. Almost all carbon resistors were replaced with fresh modern carbon-film or metal-film 5% or better. Recapped. Brand new (and removable) top cap clamp & wire assembly installed.  Line calibration performed. Calibration voltages checked & set for accuracy (150v plate 1000 ohms/v, 130v screen 1000 ohms/v, accurate bias voltage checked at several positions of the bias pot such as -3.0 at 18R, signal voltage 5.0 vac.) Diode/Rectifier/0Z4 test functions checked for accuracy. New 3-wire grounded line cord installed. General cleaning inside & out.

Includes original tube data setup book. No other paperwork included, but instruction manual and additional supplements can be downloaded or forwarded via email.

The I-177 series is a quality mutual conductance tube tester, Hickok-style circuit, and designed for testing older tubes, pre- 9-pin-miniature. Great for antique radio servicing or tube collectors that require setup data for oddball old military tubes. Not designed for someone who only wants one tube tester, because this will not really test 9-pin-miniature or newer tubes and was not designed to do that. It does do a great job of testing the old 4-pin, 5-pin, 6-pin, 7-pin-large, etc… types of tubes. They also made an adapter that has sockets for testing oddball military/transmitting tubes (adapter not included).

testing brand new Sovtek 5881 6L6WGC tube

Signal Corp I-177-B (Simpson) tube tester $449 free ship USA

Sprague TO-3 Tel-Ohmike

Sprague TEL-OHMIKE Capacitor Tester model TO-3, rebuilt and pro calibrated – $269 free ship.

Legendary TELOHMIKE quality, one of the kings of capacitor tester’s. Rebuilt and calibrated.  This model has bridge ranges for testing capacitors and resistors.  Servicing consisted of:

• circuit modified for 600 vdc polarizing voltage (to reduce power dissipation of voltage pot)
• plate voltage of magic eye reduced to prolong life of eye tube, and plate resistor upgraded to 1-meg pursuant to RCA specifications
• brand new 3-wire grounded line cord
• upgraded to solid-state rectifier
• recapped, including precision 1% or better reference capacitors
• Murata X1Y2 class safety capacitors across the line
• range-standard resistors for each resistor bridge range have been replaced with variable units, with precise calibration performed at center of bridge on each range
• insulation resistance calibration performed, and checked at 500-megohms, 1-gigohms, and 2-gigohms. Photo below shows eye tube just barely starting to open at 1-gigohm, which is accurate calibration
• eye tube replaced
• includes brand-new soldered test leads with alligator clips user side, spade lugs to tester
• includes our TubeSound remastered copy of user manual

Sprague Tel-Ohmike TO-3 capacitor tester $269 free ship

Outstanding tester, far better accuracy than it was originally shipped from Sprague. Photos below demonstrate testing of calibration capacitors and max output voltage. Capacitors and Fluke meter not part of sale.

testing 2.00uf calibration capacitor

testing 200pf calibration capacitor

testing 0.02uf calibration capacitor

Leaky cap

Cap without leakage

Insulation Resistance calibration

Leeds Northrup Decade

LEEDS & NORTHRUP precision hand-wound resistor decade, brass/wood construction – $69 free ship

I have never seen another one exactly like it. This is a LEEDS & NORTHRUP precision resistor decade, featuring wood case, brass contacts and brass jumpers, and hand-wound precision resistor coils. Outstanding collectors item, a true vintage American-made antique.

A brass jumper plug enables or disables each resistor, which allows very quick selection of desired resistance. Resistors are 1.0, 2.0, 3.0, 4.0, 10, 20, 30, 40, 100, 200, 300, 400, 1000, 2000, 3000, and 4000.

The 3000 (tested 3030 ohms) and 4000 (tested 4060 ohms) resistors tested very slightly high resistance, so I shunted them to bring them into almost perfect accuracy. Max resistance should be 11,100 ohms, and now tests 11,130 ohms as shown by my Fluke DMM, which is approx 0.3% error margin across the entire decade.

Leeds-Northrup resistor decade $69 free ship

Superior TV-11 Tube Tester – $159 free ship

Here is a simple “no-frills” emission tube tester, a classic Superior Instruments model TV-11 tube tester, Made in USA. Nothing fancy or complicated here, just a basic emission test circuit. Easy to use. Nice hardwood case, beautiful front panel.

Repairs consisted of performing line calibration and installing new line rectifier, emission calibration tweaked for best accuracy testing my set of calibration tubes, recapped, brand new 3-wire grounded line cord installed, cleaning inside and outside, socket pins cleaned and shine real nice.

Popular for buyers who want a cheap tube tester primarily to sort through their tube inventory and cull out the obvious duds. This tester has sockets for testing tubes with 4-pin thru 9-pin-miniature.

Paperwork includes a photocopy of operating instructions and also one original supplement chart.

testing 6L6 calibration tube

testing weak calibration tube

Superior TV-11 tube tester -- $159 free ship USA

Jackson 637

Jackson 637 antique tube tester, serviced – $199.99

Here is a real antique tube tester — a 70-year-old 1940-vintage Jackson 637 Dynamic Output tube tester. This 637 already has the 9-pin-miniature socket installed, which places the manufacture date at 1940-1941. This is a good tester for checking the old 4-pin, 5-pin, 6-pin type of tubes. Probably the newest tube that you can check on this tester would be a 12AX7, so this tester will always play a complimentary role with another tester. It would be a perfect companion to someone who already owns a “newer” tester, such as a BK 700 / 707 / 747 or any Sencore Mighty Mite or Sencore Continental.  Adding this Jackson will allow you to test those antique 01-A tubes, those #45 or #50 or #71A triodes, those 6E5/6U5 eye tubes, those #80 or #83 rectifiers, etc.

Servicing consisted of:

• upgraded to solid-state Line
• Line calibration performed
• new 3-wire grounded line cord installed
• 8 brand new quality rubber feet installed
• new capacitor
• all controls, contacts, pots, and tube pins individually cleaned
• chassis has been cleaned, and beautiful wood cabinet has been cleaned
• all cabinet hardware (latches, hinges, handle) have been polished
• I am including a copy of our TubeSound remastered copy of our Jackson 634-637 manual and charts
• the VOM capability has NOT been serviced, and should never be used in any tube tester that had VOM functions. The risk of damaging the meter is too great
• Photos below show accurate testing of our calibration tubes. Tubes not included

Testing 6L6 calibration tube

Testing weak calibration tube

Testing globe #50 triode tube

Jackson 637 with remastered paperwork

beautiful hardwood cabinet

Jackson 637 tube tester $199.99 free ship

pro KNIGHT 600C tube tester – $379.99 free ship*

Knight 600C Tube Tester $379.99 free ship

One of the most versatile tube testers you can find. This model has 13-built in sockets for versatile tube testing from the earliest 4-pin style tubes (like 01-A, #45 triode, etc…) up through modern 12-pin compactron.

• 4-pin (eg: 2A3, 83 rectifier, 01A)
• 5-pin (eg: 807, #47)
• 5-pin nuvistor (eg: 6cw4)
• 6-pin (eg: #42 pentode) with pilot lamp test socket
• 7-pin antique (large pin) (eg: #53)
• 7-pin miniature (eg: 6AU6)
• 8-pin octal (eg: 5AR4, 6550, 6L6GC, 5U4GB, etc…)
• 8-pin loctal (eg: 7N7)
• 9-pin miniature (eg: 12AX7, 12AU7)
• two 9-pin novar (eg: 7868, 6LQ6, 6JB6A)
• 10-pin miniature
• 12-pin compactron (ex: 6KD6)
• all socket pins individually cleaned for perfect continuity and shine “close to new”

Serviced and calibrated, includes professional reprint of manual and two supplement charts.  American-made.  Quality rubber feet on bottom and backside to protect your workbench.

This model uses the same industry-standard emission test also used by Heathkit, Eico, and Triplett, and in fact you can use setup charts from those other brands (with minor mental adjustment) to supplement your Knight paperwork.

Photos below show line calibration and tube test results.  Fluke meter and sample tubes are shown to demonstrate tube tester and are not part of item for sale.

Line calibration

shorts test

leakage test

Weak tube

12-pin compactron testing

6550 audio tube test

4-pin triode tube test

wood case

5881 test

Technipower 12V Regulated Power Supply

Technipower regulated 12V-3A DC power supply – $49.99 free shipping*

Technipower power supply $49.99 free ship

Technipower is the BEST of the best. Made in USA, true military & high industrial grade, “repeatable and precise”. Built like a tank. Looks like a transformer, but it is a complete regulated 12 VDC power supply. Sealed construction except for a single voltage adjustment pot accessible on the underneath. Rated at 3A output. Input is 105-125 VAC, 50Hz-400Hz. I can tell you that I ran it up on a variac, and it had strong stable output even with much lower AC input voltages. Rock solid and extremely low ripple (less than 0.2 mV measured with Fluke 179). Dimensions 7-inch tall, 5-inch wide, 4.25-inch deep. Date code 22nd week of 1983.

Original price for this power supply would have been super expensive.