Batch of valves

[ppppenguin]

A batch of valves has come to me from a clearance. As far as I can see, all are unused, boxed NOS. I'm not really aware of the uses of most of them nor their value. I don't think I have any equipment that uses any of them. I've had a look on the invaluable National Valve Museum site http://www.r-type.org/index.htm   which give basic information and links to data sheets. If anyone can add useful information about how/where they were used in real life and indications of anything valuable that would be useful. If I sell any of them, the proceeds will goto BECG  www.becg.tv

Here's the list:

[Mike Watterson]

AC/VP1 comes in 5 and 7 pin versions, RF/IF 1934 -1937. The 5 pin version seems rarely used. The AV/SGVM is probably older RF/IF 5 pin 4V
The D42 is another rarely used Mazda early 1930s detector (single diode)

SU25 is new to me, 25 kV 1mA rectifier with Octal base. It seems like the only really unusual one.

The 117Z6GT will be for US use without a dropper or transformer. Unlike some other dual rectifiers it can be used as a voltage doubler. Needed for direct mains radios in USA with higher than 120V HT.
U281 is half wave 200 mA series.

The N14 = 1C5G, a 1.4V battery audio out (originally Sylvania 1938)
Pen25 is 2V battery audio out.
18 is USA series heater audio out, early 1930s
25L6GT also US Audio out, it and 50V version popular in All American Five line up.
6L5G a popular 1930s triode. Maybe they are worth something.
6N6G is a preamp and power out pair of triodes for audio. Not push pull, but a complete audio amp for a radio. 1935 & 1936 are the peak years. USA.
So seems a mix of Mazda and USA 1930s. Though some are more European, like ECH3.

They seem like a random mix of valves for different things judging by variety of audio out types.

[Mike Watterson]

I'd certainly have radios that use some of these.
Are they one offs or numbers of each?
Do they seem unused or ex-equipment?
Most would have been common in the 1930s.

[ppppenguin]

I think it's the remains of a much larger batch of valves that came from a radio dealer that had closed. The PX4s and suchlike were sold for real money and I've got a few oddments that were left.

They are all singles, apart from AC/VP1, AC/SG VM, 6N6G where I have 2 of each. All seem to be unused in original boxes. Condition of boxes varies from near mint to very rough.

[JohnBS]

I think the AC/SG is used in the Pye MM portable; I have restored one but couldn't find any new valves at the time.
Also looking for the output AC/PEN which is very weak!
John

[ppppenguin]

If anyone wants to buy any of the valves then we need to work out a suitable donation as mentioned in my initial post. Plus postage at cost.