I am looking for ideas on what to build with these tubes.
they are very old, some are as old as the mid 30's
some of the military tubes have 1944 date codes
some of the TV tubes are from the 60's but nothing newer.
6E5 x3
3D21B x2
336A
5V4G
7S7 x3
6N7 x6
6H6 x3
6F6 x3
6SA7Y x3
25Z6Gt x3
6SJ7Y x11
657WGT
12SL7GT x2
JAN5879 x2
RCA OC2 x2
1U5 x3
12B4A x7
12BF6
6X4WA x6
6AT6 x5
6BJ6 x5
2E3D x3
JAN 5654
6BA6
6111WA
6AN8A
26A6
12AY7
JAN 6189
JTL 3Q4
VT-174 x3
JAN 1R5
6AN5WA
JAN 5727
7683
6Q7GT
6AC7WA
6SL7WGT
12J5Gt
CRC12A6
JAN6X5GT
JAN5644
CRC65G7Y
6K7GT
edited to add:
6AN8A
6HB7
12Au7A x2
6C4
6AB4
12AX7 x2
12AU7 x2
and two others that i'm pretty sure are 12au7 or ax7's
also have an unknown dual rectifier from a heathkit oscope, and an amperite ballast 9-7
they are very old, some are as old as the mid 30's
some of the military tubes have 1944 date codes
some of the TV tubes are from the 60's but nothing newer.
6E5 x3
3D21B x2
336A
5V4G
7S7 x3
6N7 x6
6H6 x3
6F6 x3
6SA7Y x3
25Z6Gt x3
6SJ7Y x11
657WGT
12SL7GT x2
JAN5879 x2
RCA OC2 x2
1U5 x3
12B4A x7
12BF6
6X4WA x6
6AT6 x5
6BJ6 x5
2E3D x3
JAN 5654
6BA6
6111WA
6AN8A
26A6
12AY7
JAN 6189
JTL 3Q4
VT-174 x3
JAN 1R5
6AN5WA
JAN 5727
7683
6Q7GT
6AC7WA
6SL7WGT
12J5Gt
CRC12A6
JAN6X5GT
JAN5644
CRC65G7Y
6K7GT
edited to add:
6AN8A
6HB7
12Au7A x2
6C4
6AB4
12AX7 x2
12AU7 x2
and two others that i'm pretty sure are 12au7 or ax7's
also have an unknown dual rectifier from a heathkit oscope, and an amperite ballast 9-7
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Hi!
There are some interesting tubes among those you listed. If you want to get a little better impression of what you have, you can search tubes at TDSL Tube search
Surely there are some exotic and expensive tubes, but in my experience the electronics around the tubes form the highest costs and complexity of a (pre) amplifier. Therefore it is best if you can define what you want to build, how much experience you have with electronics, and how much you are willing to spend.
Best regards, Erik
There are some interesting tubes among those you listed. If you want to get a little better impression of what you have, you can search tubes at TDSL Tube search
Surely there are some exotic and expensive tubes, but in my experience the electronics around the tubes form the highest costs and complexity of a (pre) amplifier. Therefore it is best if you can define what you want to build, how much experience you have with electronics, and how much you are willing to spend.
Best regards, Erik
Johansen,
I am currently building "Octal" 8 pin tube projects, mainly old design guitar amps that have the exact sound of this era. As soon as I saw your "6SL7" I started to drool. Keep these!!!!!!! They make super high gain pre-amp sections and are great for phono inputs and guitar. Do you have acess to a good tube tester that tests gain?
I am currently building "Octal" 8 pin tube projects, mainly old design guitar amps that have the exact sound of this era. As soon as I saw your "6SL7" I started to drool. Keep these!!!!!!! They make super high gain pre-amp sections and are great for phono inputs and guitar. Do you have acess to a good tube tester that tests gain?
I see right off something similar to what I'm building, a parallel 12B4 single ended, driven by a 12AU7....I see you have a 12AY7, rather a bit hot at Av of 44 compared to the AU7 at 17-20. With seven 12B4As' ( "A" designation is 'controlled, slow heater warm-up version) you could do a triple parallel output ??
I suppose there is a rectifier somewhere in there...6X4WA, a bunch
----------------------------------------------------------Rick..........
I suppose there is a rectifier somewhere in there...6X4WA, a bunch
----------------------------------------------------------Rick..........
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I have not gotten a chance to download and read every data sheet I can find for these tubes, as I mentioned they are very old and the tubes changed characteristics over the years, the same tube might have 6 different datasheets by 6 different manufactures
only a couple of those tubes have the getter partly worn away, but seeing as some of those are 70 years old, i guess that's really not surprising, some have no getter sprayed on the glass but others with the same part number do, not sure what to make of that.
I also have 5x 12AU7's inside some simpson312 VTVMs they also have an EAA91 double diode which is the same as 6AL5
i should also mention i don't have any output transformers unless i want to scrap a tube filled reel to reel tape player (which is in great condition)
I have no shortage of fine wire and transformer cores however.
as far as experience goes, i tend to stick with stuff like this
http://johansense.com/bulk/boost/4phase_v1_3.JPG
I have some old tube books but i really don't know what the capabilities are of the tubes i have, nor how to use them in sensible ways.
those 3D21B's are interesting
http://www.mif.pg.gda.pl/homepages/frank/sheets/077/3/3D21WB.pdf
"beam power tetrode for pulse duty"
hmm
peak cathode current 10 amps, peak plate voltage 4000...
direct driven electrostatic speakers?
oh, i have a 4-65A as well. which is just asking to be used in an RF amp, but i have never really been interested in RF gear and getting my license.
I suppose I'm sitting without excuse for not building a doomsday emp proof radio transceiver. can't be that hard for am modulation, but I never did really understand how they did FM discrimination with tubes.
only a couple of those tubes have the getter partly worn away, but seeing as some of those are 70 years old, i guess that's really not surprising, some have no getter sprayed on the glass but others with the same part number do, not sure what to make of that.
I also have 5x 12AU7's inside some simpson312 VTVMs they also have an EAA91 double diode which is the same as 6AL5
i should also mention i don't have any output transformers unless i want to scrap a tube filled reel to reel tape player (which is in great condition)
I have no shortage of fine wire and transformer cores however.
as far as experience goes, i tend to stick with stuff like this
http://johansense.com/bulk/boost/4phase_v1_3.JPG
I have some old tube books but i really don't know what the capabilities are of the tubes i have, nor how to use them in sensible ways.
those 3D21B's are interesting
http://www.mif.pg.gda.pl/homepages/frank/sheets/077/3/3D21WB.pdf
"beam power tetrode for pulse duty"
hmm
peak cathode current 10 amps, peak plate voltage 4000...
direct driven electrostatic speakers?
oh, i have a 4-65A as well. which is just asking to be used in an RF amp, but i have never really been interested in RF gear and getting my license.
I suppose I'm sitting without excuse for not building a doomsday emp proof radio transceiver. can't be that hard for am modulation, but I never did really understand how they did FM discrimination with tubes.
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