UK CRACK

[vikingtap]

Nice build!  The extra octal socket is a great idea, and should be a lot of fun to roll tubes.

If you wanted to leave a tube in both sockets, a SPDT switch could be used to switch power between pin 9 on the 9 pin socket and pin 8 on the octal driver socket (note - you may have pin 9 going to pin 7 on the octal socket, which is also OK).

If two tubes are plugged in but only one is heated, the dark tube will not draw any current and shouldn't cause you any problems.

-PB

Now that sounds like a great idea. This is how i wired it up (this is a snapshot from HF9's web blog). So a simple SPDT that is rated to at least 170v would be ok?

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimg35.imageshack.us%2Fimg35%2F5895%2F9pinto8pinwiring.png&hash=25d9d96636fd2274a89e3a4a94a72c3a5fe30e3c)

[Paul Birkeland]

Yes, you can lift the wire feeding 9-Pin 9 and octal 8, then switch that.  The switch will be switching 6V AC at under 1A of current, so your options are very open.  There are probably automotive switches you could buy easily that would do the job.

I'm not so sure, however, that I would throw that switch while the Crack is running.  If you wanted that ability, I could run you through how to undo the direct coupling to maintain some bias on the 6080 while the switching and warmup took place.

-PB

[vikingtap]

Thanks:

   A simple switch i believe will do very nicely. Even if i could switch back and forth whilst power is running through the circuitry, i would still rather turn the amp off before any switching took place. I am still very much a newbie regarding all things electrical. It is only because of the simply BRILLIANT instructions that came with the kit in the first place, that i have attempted anything like this.

[earwaxxer]

Agreed.... The documentation is the best in the business! 

[vikingtap]

Just installed the lovely Seiden's pot with Takman metal film. I originally installed a Tocos which in itself i feel is a really nice pot for the price. The Seiden's is in another league i feel, a very worthwhile upgrade in my opinion.

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimg849.imageshack.us%2Fimg849%2F7311%2Fdsc01488s.jpg&hash=4b2a98f35de7f7c3cb22a401ed697b8adfae3dc1)

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimg842.imageshack.us%2Fimg842%2F9020%2Fdsc01489lef.jpg&hash=c5aaf05350e8d33fc57a23f713db87ee7d856ac8)

(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fimg838.imageshack.us%2Fimg838%2F8586%2Fdsc01487p.jpg&hash=9855f30f298d4fa712dc8e6ed24fb1b50aa13ef6)

I had to cut away a bit of the Second plate to accommodate the larger size of the Seiden's.