Compactrons on the brain!

flacoman · 18th September 2008, 05:27 PM

How about this idea?
6AF11 or 6C11 front end and a pair of 53HK7 outputs .
Series heater string and about 350 V B+ . Figure about 10-12 watts .
Feel free to shoot this idea full of holes :-)

Regards
Jorge

Alastair E · 18th September 2008, 05:39 PM

You Too!

It must be catching.....

Just ordered 10 12GE5 Compactron Horiz O/P bottles to play with!

Great minds they say!

audiowize · 18th September 2008, 06:59 PM

The 6GF7 seems like a nice one to mess with. You could implement a directly coupled cathodyne with the two smaller triodes and have a nice triode push-pull amp with the big ones.

I've built three compactron amps so far... thinking about a much bigger one soon!

Wavebourn · 18th September 2008, 07:18 PM

I used 8AL9 to drive MOSFET in class A hybrid, sounded superb. I'll post a schemo if find it.
Also, I tried 24JZ8 with the same results (filaments of both channels were powered from the same 50V source I used for output MOSFET source follower loaded on bipolar modulated CCS)

astouffer · 18th September 2008, 08:57 PM

Alastair E: I also bought some 12GE5s from the last sale at AES. Never did much with them. Also got some 12HL7s to play with. Thought about maybe triode strapping the HL7s as drivers.

tubelab.com · 18th September 2008, 09:31 PM

Quote:

The 6GF7 seems like a nice one to mess with. You could implement a directly coupled cathodyne with the two smaller triodes and have a nice triode push-pull amp with the big ones.

The 6GF7 makes a good SE spud amp in the 1 to 2 watt range. The pinout is compatible with the 6LR8 which is a much bigger vertical output triode - pentode. It is possible to make an amp that will work with both tubes.

Spud anyone?

mach1 · 19th September 2008, 05:25 AM

Quote:

The 6GF7 makes a good SE spud amp in the 1 to 2 watt range.

Antique electronic are currently selling 13GF7 for 75% off ($1.52). I just bought a lifetime stash. 195 left.

audiowize · 19th September 2008, 05:34 AM

Quote:

Originally posted by tubelab.com

The 6GF7 makes a good SE spud amp in the 1 to 2 watt range. The pinout is compatible with the 6LR8 which is a much bigger vertical output triode - pentode. It is possible to make an amp that will work with both tubes.

Spud anyone?

You might squeeze 4-8 watts with two in push-pull. In SE, there are other compactrons I like more, like the 6FY7.

flacoman · 19th September 2008, 12:02 PM

I'd like to do something a bit bigger , hence 53HK7 outputs.
Any idea what the equivalent innards are ? Looks to be abt 10 watts Pd , perhaps close to 6V6 or 6BQ5. Looks like it wants lower B+ ,so a lower output Z .
Regards
Jorge

smoking-amp · 19th September 2008, 04:47 PM

"Any idea what the equivalent innards are ?"

The 6HE7 appears to have the same pentode.

Complete data on either here:
http://www.mif.pg.gda.pl/homepages/f...23/3/38HE7.pdf
http://www.mif.pg.gda.pl/homepages/f...23/3/38HK7.pdf

Don

18th September 2008, 05:27 PM	#1
flacoman diyAudio Member Join Date: Feb 2006 Location: Ft Laud. Fla	Compactrons on the brain! How about this idea? 6AF11 or 6C11 front end and a pair of 53HK7 outputs . Series heater string and about 350 V B+ . Figure about 10-12 watts . Feel free to shoot this idea full of holes :-) Regards Jorge

18th September 2008, 05:39 PM	#2
Alastair E diyAudio Member Join Date: Feb 2004 Location: South Wales	Compactrons... You Too! It must be catching..... Just ordered 10 12GE5 Compactron Horiz O/P bottles to play with! Great minds they say! __________________ Das Beste Oder Nichts

18th September 2008, 07:18 PM	#4
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	I used 8AL9 to drive MOSFET in class A hybrid, sounded superb. I'll post a schemo if find it. Also, I tried 24JZ8 with the same results (filaments of both channels were powered from the same 50V source I used for output MOSFET source follower loaded on bipolar modulated CCS) __________________ The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity!

19th September 2008, 12:02 PM	#9
flacoman diyAudio Member Join Date: Feb 2006 Location: Ft Laud. Fla	Vertical output tubes are great but... I'd like to do something a bit bigger , hence 53HK7 outputs. Any idea what the equivalent innards are ? Looks to be abt 10 watts Pd , perhaps close to 6V6 or 6BQ5. Looks like it wants lower B+ ,so a lower output Z . Regards Jorge

19th September 2008, 04:47 PM	#10
smoking-amp diyAudio Member Join Date: Dec 2001 Location: Hickory, NC	"Any idea what the equivalent innards are ?" The 6HE7 appears to have the same pentode. Complete data on either here: http://www.mif.pg.gda.pl/homepages/f...23/3/38HE7.pdf http://www.mif.pg.gda.pl/homepages/f...23/3/38HK7.pdf Don __________________ Ohms Law V = I R

18th September 2008, 06:59 PM	#3
audiowize diyAudio Member Join Date: Aug 2005	The 6GF7 seems like a nice one to mess with. You could implement a directly coupled cathodyne with the two smaller triodes and have a nice triode push-pull amp with the big ones. I've built three compactron amps so far... thinking about a much bigger one soon!

18th September 2008, 08:57 PM	#5
astouffer diyAudio Member Join Date: Jun 2004 Location: Pittsburgh, crumbling wasteland	Alastair E: I also bought some 12GE5s from the last sale at AES. Never did much with them. Also got some 12HL7s to play with. Thought about maybe triode strapping the HL7s as drivers.

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