[reomi]

thank you... my mind must have already left for the weekend, I was on the page and didn't see them. I will be trying them in my guitar amp and Bottlehead Foreplay pre-amp. Will report back.

Where does one find the blue teflon tube sockets?

DIY HiFi Supply... http://www.diyhifisupply.com/diyhs_sockets.htm

[Gordy]

   mine packed up and left years ago...  My only tube project so far, a preamp, has ceramic sockets on both the amp and power supply boards so, I'll be very interested in hearing of your results!

[jrebman]

Ray,

Just to throw a bit of confound into the works -- partsconnexion sells an Elma 2 to 6 position, single deck (2 poles per deck) srotary selector switch for $40.  These are probably not the hard gold contact version, but you can't go wrong either way.  You can pin these for anything from 2 to 6 positions.  DACT also makes a 5 position selector switch, but at $85 is not cheap.  Then there is Shalco as well.

I will probably order some of these diyhifisupply teflon sockets, and hope they are better than the earlier teflon sockets of a few years ago, wh9ich were reported to have long term problems with maintaining contact grip.  If you want to stick with ceramics -- the Azumas are actually very nice, but they don't have an octal PC mount.

I'm putting a PEC pot in my single-ended amp project, and these are supposed to be very nice too.

As for switching both hot and ground -- yes, it saves some money to run a common ground, but I've always used chassis isolated RCAs with both hot and ground connections switched, and probably always will -- can't say that I ever did an A/B comparison, but just good grounding practice says that having all low level signals travelling the same path and grounding at one same point should be better, and should be considered as a matter of course if you are using dual or pseudo dual mono power supplies, and depending on how the rest of the circuit's grounding is implemented.

I think most people simply don't do it because it is extra hardware and labor expense.

-- Jim

[guest1632]

Ray,

Just to throw a bit of confound into the works -- partsconnexion sells an Elma 2 to 6 position, single deck (2 poles per deck) srotary selector switch for $40.  These are probably not the hard gold contact version, but you can't go wrong either way.  You can pin these for anything from 2 to 6 positions.  DACT also makes a 5 position selector switch, but at $85 is not cheap.  Then there is Shalco as well.

I will probably order some of these diyhifisupply teflon sockets, and hope they are better than the earlier teflon sockets of a few years ago, wh9ich were reported to have long term problems with maintaining contact grip.  If you want to stick with ceramics -- the Azumas are actually very nice, but they don't have an octal PC mount.

I'm putting a PEC pot in my single-ended amp project, and these are supposed to be very nice too.

As for switching both hot and ground -- yes, it saves some money to run a common ground, but I've always used chassis isolated RCAs with both hot and ground connections switched, and probably always will -- can't say that I ever did an A/B comparison, but just good grounding practice says that having all low level signals travelling the same path and grounding at one same point should be better, and should be considered as a matter of course if you are using dual or pseudo dual mono power supplies, and depending on how the rest of the circuit's grounding is implemented.

I think most people simply don't do it because it is extra hardware and labor expense.

-- Jim

Hi Jim,

on those switches, for the hot and ground, don't you need two decks to do that right? I was thinking of getting the Transcendentsound GGP, because I found someone who has a almost unopened kit for a good price. Wanted to replace that switch and yeah, make try the Peck pots and Teflon sockets too. The circuit is good. I'd have to have someone build it for me, but that's the breaks of being blind. I can do some soldering. That might be ok, to replace the coupling cap on the ouputs. Keep me appraised when you get that pot in there how it sounds.

Ray

[jrebman]

Ray,

Yes, you'd need two decks and I'm not actually sure if these are modular or not -- i.e., if you can add a deck or not.  There is a Shallco 4 pole switch, and I think goldpoint also makes a 4 pole 5 or 6 position switch.  Another trick -- if you have 5 positions and only need 3, make the second and fourth positions mutes that way you have a mute next to every position.

-- Jim