adapter to go from 6L6 to 807

Original Burnedfingers · 22nd January 2012, 11:55 AM

hi,

Have been thinking about making an adapter so I could try 807's in my Wurlitzer 6420 mono block amps. So here is what I came up with. I would appreciate your suggestions and comments.

octal side/base to 5 pin socket

pin 1 NC

pin 2 to pin 1 on 5 pin socket

pin 3 drill hole in octal base near pin 3 of octal socket to run to plate cap

pin 4 to pin 2

pin 5 to pin 3

pin 6 nc

pin 7 to pin 5

pin 8 to pin 4

Alastair E · 22nd January 2012, 03:39 PM

Should work out pretty good--Just watch those top-caps!

6L6 and 807 are basically the same valve, just the 807 version was made for RF duty so they shoved the plate to a top-cap....

Original Burnedfingers · 22nd January 2012, 09:19 PM

Picture

Wavebourn · 22nd January 2012, 10:36 PM

Except pin3: if go from 6L6 to 807 I would use the feature, when anode is far from filament (pin2).

Original Burnedfingers · 23rd January 2012, 10:48 AM

quote:
Except pin3: if go from 6L6 to 807 I would use the feature, when anode is far from filament (pin2).

So, what are you saying? Don't make the adapter? Make the adapter but run the plate wire outide of the adapter?

trobbins · 23rd January 2012, 11:20 AM

Maybe put an anode stopper near the cap, and take the anode lead as far from other pins as possible.

Perhaps try and shield the grid interconnect, and/or include a grid stopper in the adaptor.

22nd January 2012, 03:39 PM	#2
Alastair E diyAudio Member Join Date: Feb 2004 Location: South Wales	Should work out pretty good--Just watch those top-caps! 6L6 and 807 are basically the same valve, just the 807 version was made for RF duty so they shoved the plate to a top-cap.... __________________ Das Beste Oder Nichts

22nd January 2012, 10:36 PM	#4
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	Except pin3: if go from 6L6 to 807 I would use the feature, when anode is far from filament (pin2). __________________ If I disappear suddenly, that means I finally created a time machine and pushed wrong button that brought me to Stalin's Russia. In any experiment any result is the result. Even if it is negative.

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23rd January 2012, 10:48 AM	#5
Original Burnedfingers diyAudio Member Join Date: Nov 2002	quote: Except pin3: if go from 6L6 to 807 I would use the feature, when anode is far from filament (pin2). So, what are you saying? Don't make the adapter? Make the adapter but run the plate wire outide of the adapter?

23rd January 2012, 11:20 AM	#6
trobbins diyAudio Member Join Date: Feb 2009 Location: Melbourne, Oz	Maybe put an anode stopper near the cap, and take the anode lead as far from other pins as possible. Perhaps try and shield the grid interconnect, and/or include a grid stopper in the adaptor.