Kid Squid

Anyone know what these Valve / Tubes are ??
« on: September 13, 2004, 06:45:50 PM »
Hello All,

Just wondering if anyone had any info on these valves, as i've no idea what they are.

http://usera.imagecave.com/KidSquid/RCA8-52Valve.JPG

This is marked as   RCA , Made in U.S.A., 8 - 52.


http://usera.imagecave.com/KidSquid/RCA9-09Valve2.JPG


This is marked as   RCA , Made In U.S.A.,  9 - 09.

Any help is apreciated  :thumb:

Steve[/url]
It is not the same as 4+12, nor is it the same as 4+8, but 4+12 IS the same as 4+8+12....

http://www.facebook.com/LazyLizardLabs


mcs

Anyone know what these Valve / Tubes are ??
« Reply #1 on: September 13, 2004, 06:59:10 PM »
Look for some faint markings on the glass somewhere - perhaps on the top.

The first one looks like a rectifier - perhaps a 5R4G or 5U4G? The second could be a 6V6GT.

Best regards,

Mikkel C. Simonsen

Anyone know what these Valve / Tubes are ??
« Reply #2 on: September 13, 2004, 07:17:40 PM »
Don't hold me to this, but isn't a 52 an old type triode like a 45? They predate the current numbering system I think. Maybe it's one of those.

 :thumb:

I love a good audio mystery.
Seth

The definition of insanity: "Hey, this thing could be really cool - if I had the money to fix it up, which I don't, but if I did it could be really cool - if I had the time, which I don't, but

Kid Squid

Anyone know what these Valve / Tubes are ??
« Reply #3 on: September 13, 2004, 07:25:24 PM »
Hello Chaps,

Right, I've checked the glass envelopes, and i can't make out any markings at all.

Seth, if this can be of help, the guy who gave them to me, said they'd come from an 1930's ??? Hammond Organ amp.

Steve :thumb:
It is not the same as 4+12, nor is it the same as 4+8, but 4+12 IS the same as 4+8+12....

http://www.facebook.com/LazyLizardLabs

Anyone know what these Valve / Tubes are ??
« Reply #4 on: September 13, 2004, 07:50:01 PM »
I looked around a bit more - there is a type 52 but it's a tetrode, not a triode.

 :guinness:  :sam:
Seth

The definition of insanity: "Hey, this thing could be really cool - if I had the money to fix it up, which I don't, but if I did it could be really cool - if I had the time, which I don't, but

mcs

Anyone know what these Valve / Tubes are ??
« Reply #5 on: September 13, 2004, 07:50:07 PM »
Quote from: "jrmintz"
Don't hold me to this, but isn't a 52 an old type triode like a 45?

Are you talking about the VT-52? But 8 - 52 is a date code - not a tube type...

Best regards,

Mikkel C. Simonsen

Anyone know what these Valve / Tubes are ??
« Reply #6 on: September 13, 2004, 08:01:58 PM »
Steve,

I'm sure Mikkel is probably correct, and I'm certainly no expert. I imagine CJ or PRR will look at it and know what it is from the structure.
Seth

The definition of insanity: "Hey, this thing could be really cool - if I had the money to fix it up, which I don't, but if I did it could be really cool - if I had the time, which I don't, but

mcs

Anyone know what these Valve / Tubes are ??
« Reply #7 on: September 13, 2004, 08:04:31 PM »
Quote from: "jrmintz"
Steve,

I'm sure Mikkel is probably correct, and I'm certainly no expert. I imagine CJ or PRR will look at it and know what it is from the structure.

The only problem being that the second one has graphite coating on the inside, so you can't see the structure...

Best regards,

Mikkel C. Simonsen

Kid Squid

Anyone know what these Valve / Tubes are ??
« Reply #8 on: September 13, 2004, 08:19:22 PM »
Ta for the help Chaps  :thumb:

Steve
It is not the same as 4+12, nor is it the same as 4+8, but 4+12 IS the same as 4+8+12....

http://www.facebook.com/LazyLizardLabs

PRR

Anyone know what these Valve / Tubes are ??
« Reply #9 on: September 14, 2004, 12:09:55 AM »
> I imagine CJ or PRR will look at it and know what it is from the structure.

MCS said it all, nothing to add, no idea why this thread isn't dead.

Top one is one of the standard rectifiers. No good way to know which one without a reference museum. No matter, because 90% of US rectifiers have the same pinout and filament voltage; anyway a clean new-old rectifier like this is cheap.

The other we can not see inside, but vast numbers of 6V6 were made that way. A few other tubes were: feed it 6V on the heater and check the current. 6V6 is 0.45A, most smaller tubes are 0.3A. If it is much less, it is something like 50C5, an AC/DC radio output pentode, uninteresting. And  whatever it is, it isn't worth a lot, especially without markings.

The base numbers ARE date-codes. They are probably year and week. 08 is Feb/March, 52 is December. Not decade, so we don't know if these are 1930s or 1940s.

The type 52 tube is not an octal base.


Kid Squid

Anyone know what these Valve / Tubes are ??
« Reply #10 on: September 14, 2004, 05:40:44 AM »
:thumb:

Steve
It is not the same as 4+12, nor is it the same as 4+8, but 4+12 IS the same as 4+8+12....

http://www.facebook.com/LazyLizardLabs

CJ

Anyone know what these Valve / Tubes are ??
« Reply #11 on: September 15, 2004, 01:00:36 AM »
Those silk screened numbers really rub off easily. Age, heat, people yanking them in and out of the chassis...
Be careful of that on vintage tubes, try not to touch the labeling.
Could damage the resale if they don't see the little guy playing the bugle.

Hard to tell what those tubes are. Look closely on the top of the tube, as this is where many tubes were stamped.
cj
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html


 

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