Hickok 752A tube tester For Sale – SOLD

This High end tube tester with original manual and one original supplemental tube setting books is considered one of the best bench top tube testers made.

The exterior of the cabinet has some wear and some of the cloth covering has a few rips, and wear marks, the interior is in very good condition. The tube chart rolls perfectly. This tester is very good to excellent condition – the meter and knobs are in perfect condition.

  • Checks mutual transconductance for tube quality test which is the most reliable test known.
  • Meter has only one scale which makes it easier to read than most other Hickok testers. A multiplier switch is set rather than using several meter scales.
  • Handy “Plate 2” button allows for testing double section tubes without resetting selector switches.
  • Meter and roll chart are backlit….another feature not found on most Hickok checkers. This feature really makes the tester a joy to use in darker rooms.
  • #49 light bulb acts as a bias fuse to protect the sensitive bias potentiometer.
  • 2 plate voltages available.
  • Life Test button
  • Terminals for attaching external self-bias resistor.
  • Shorts and leakage are indicated on the meter rather than a less reliable neon bulb.
  • Sensitive gas test
  • The Model 752A has all of these sockets with the addition of 9 pin and 12 pin compactron, 10 pin decal, and both types of nuvistor sockets

752 and 752A.

These are the famous FAA testers. The 752 is a beautiful machine . The “A” model has the 9 and 12 pin compactron sockets and is more money.

The best feature of the 752’s is the dual triode test buttons-you can test both halves of a twin triode without re-setting the selectors. This is a must, if you test a lot of 12ax7’s – 12au7’s etc

The model 580 is somewhat similar to 752 but really demands a premium price
The Hickok 750, 752 and 752A are a little more costly. All these also have noise tests, and short/leakage tests too! More than one test signal is provided. The 752/752A also allows you to test both sections of a dual section tube without re-setting all the switches for that section of the tube. In addition the 752/752A does not have a short test lamp they use the main Gm meter as an ohm meter and measure leakage in ohms. The 750 uses the short lamp circuit only. All these models have only one power transformer. These do not have a separate AC line set meter so the line sag issue is more prevalent. Again good, reliable, accurate tester.


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Admiral 5D4 Model 275 AM Tube Radio – SOLD

This one is about as good as they get, almost immaculate

Admiral 275 – 5D4 American 5 tube am radio in Red. Made in 1958.

The Good:

This radio has been Restored with New Electrolytic Capacitors. All the tubes have been tested on a Hickok 533. it was completely dismantled and washed in soapy water to remove all dust, the chassis was blown off with compressed air. the outer case was buffed with auto polish to remove any surface scratches, and as you can see it is shiny. there are no cracks and all places where the chassis is screwed into the plastic are solid, and the screws are original. The power cord is in great shape. The gold foil with the stars is shiny and in good shape.

The Bad:
The grooves in the tuning dial and volume knobs still have some grime in them (I didn’t want to damage the gold center caps) and the dial above the “6” has a slight scuff

The “A” and “L” in the logo has a very small amount of the gold plating worn off.

the grill is 99% perfect, except for some slight discoloration due to age.

Price – SOLD

Admiral Model 275 - 5D4 AM Tube Radio

Admiral Model 275 - 5D4 AM Tube Radio

Rear View of the Admiral 5D4 Model 275 Plastic AM Tube Radio

Rear View of the Admiral 5D4 Model 275 Plastic AM Tube Radio

Marantz 8b For Sale – SOLD

Maarantz 8b EL34 Power Amp- Front View

Maarantz 8b EL34 Power Amp- Front View

Marantz 8B EL34 Power amp + GE branded Mullard’s that are matched with Xf2 Date Codes

The Good:

  • The small signal tubes are matched RCA drivers test very strong and inputs are GE matched and test strong.
  • The power supply caps re-formed very nicely the amp has absolutely no hum, this 8b plays fine and sounds amazing.
  • It is bone stock and never has been molested under the chassis.
  • The meter works perfect as well as the amp bias sets up no problem.
The Bad:
 
   
  • The front name badge is missing – We are including an aftermarket name sticker for this amp, that is similar to the original.
  • Two of the four EL34’s have the broken octal center locators, but it’s easy to put them in correctly we will mark the tubes to make it very easy to get the amp up and running as soon as you get it.
  • Some scratches on the chassis
  • Some slight corrosion around the meter frame
  • Tube cage is available true Marantz
  • Bias setting cover caps are missing or were never installed at the factory – some shipped without caps

Sound:

 

  • This amp sounds fantastic, very transparent. The Matched GE branded Mullard’s make this amp really sing. We will carefully pack for safe shipment, shipping and boxing additional

History:

Here is some history of this fantastic amp:

“In 1959, Marantz released the Model 8. With the soon-to-follow 8B, it was the only tube stereo amplifier the company ever produced. Although most regard the Model 8B (introduced in 1962) simply as a modified Model 8, there are significant differences between the two. For one thing, the 8B featured a Sidney Smith-designed transformer, and was more stable and phase-accurate, thanks in part to a negative feedback circuit originally developed for the Model 9 monaural power amplifier…… The power output of both the Model 8 and the 8B was 30 watts per channel.” – click here if you want to continue to read about the history of marantz”

Under the Chassis of the Marantz 8B 100% stock

Under the Chassis of the Marantz 8B 100% stock

More of the Underside of the Super Clean Marantz 8B

More of the Underside of the Super Clean Marantz 8B

Marantz 8b - on the Test Bench

Marantz 8b – on the Test Bench

Closeup of the Mullard GE branded Mullard el34 tubes on the Marantz 8b

Closeup of the Mullard GE branded Mullard el34 tubes on the Marantz 8b

Marantz 8b Front View of Bias Meter
Marantz 8b Front View of Bias Meter

Marantz 8B “One of the best Classics” -SOLD

Details comming soon, we have aquired a very nice condition 8B.. It has never had any repair work done and is all original..it is for sale.. the condition is very good,  just the average wear and tare for it’s age. It works perfect and I have had it playing for over 20 hours now. ( fully quiet no hum or hiss) We will not ship outside US. Our asking price is $ 2800.00 plus shipping.. don’t miss out they do not come along like this very often.

Thanks, Pat~

UPDATE: If you have landed here see the latest post with more information about this classic!! Just updated today 9-14-2010

Dynaco ST-70 For Sale – SOLD

Dynaco ST-70 amp
Here we have an extra clean original Dynaco ST-70 Tube Amp, with cloth transformer leads,NOS dynaco branded 7199 Driver Tubes. a NEW Sovtec 5ar4 and a matched quad of Electro Harmonix el-34’sOverall Electronic Condition :
Amp has had 2 caps changed on the driver board; and were replaced with matched orange drops.on the underside of the amp you can see there is some slight discoloration on the bottom of the driver board from the heat generated from the 7199 tubes,
Also you will see a small amount of wax that has leaked out of the choke transformer, it has no effect on the discoloration.

Build Quality:

  • Since this is a Kit, the build quality is top notch, all heater wiring was routed in the correct way and twisted to ensure quiet operation; the layout was done correctly and the soldering looks very professional.

Appearance:

  • The lettering is all intact, and the chassis plating is in VERY good condition with slight pitting by the center power transformer.
  • The bottom as a few scratches and as you can see from the photos the rubber feet are missing.
  • The Tube Cage is clean; however there are a few scratches on the top surface, as well as a few minor paint chips.

Tubes:

  • The NOS 7199 tubes test Very Good / Strong + on my B&K tester(100 is new and these test 98+)
  • EL 34 tubes have about 20 hours on them and were purchased as a matched quad, they hold bias well.
  • 5AR4 tube has also about 20 hours and tests strong / new

Sound:

  • This is my second ST-70 and by far the better sounding, it also is the most original, I have played it using a Dynaco PAS2/3 preamp with an audio lab dac and the sound is fantastic, transparent and clean, it can compete with my vintage Scott in clarity and warmth. overall this is a great example of vintage American Tube Technology from the Golden Era of HiFi.
  • Click here to see the review from Audiomagazine –
  • Click here to see the review from Stereo Review both from 1959!

front pannel Dynaco ST-70

front pannel Dynaco ST-70 Top View of this ST70 in Showing the conditionBottom - Stereo 70 From Dynaco- very clean and good build quality

Bottom - Stereo 70 From Dynaco very clean and good build quality

Bottom - Stereo 70 From Dynaco- very clean and good build quality

ST 70 Driver board with original dynaco 7199 Tubes

ST 70 Driver board with original dynaco 7199 Tubes

Top View of this ST70 in Showing the condition

Top View of this ST70 in Showing the condition

Very Vintage Kay Guitar Amp – SOLD

Well it is time to let go of some gear, and this is the first piece to go. we have a very vintage KAY from the late 30’s to mid 40’s since I can’t find another one anywhere on the web I have no way to date it.

What I do know is the following:

  • The 6n6 tube was first manufactured in 1939 so the amp must be from after then.
  • We have a field coil speaker which means that it was probably earlier than 1952 or so because that was when they were able to produce magnets that were strong enough and affordable for speakers
  • The covering of the cabinet is made of the same stuff early aircraft were covered with
  • The soldering was very well done so it is probably post war since there was a rather high demand for electronics after the war and there were a lot of trained electronics assemblers that needed work

If anyone knows any more about this very cool and good sounding amp please feel free to contact us.This small amp produces about 4 watts of power and has been restored and upgraded with new caps, and a 3 prong grounded cord. The buyer will receive the original caps and all the other “bad” parts that were removed during the restoration.