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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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PostPosted: 30 Mar 2010, 10:15 
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Joined: 28 Mar 2010, 13:14
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Can anyone point me in the right direction to getting a couple of these PCBs ,I'm interested in trying a few variants of this amp and would love to get my mitts on them boards ,so I,m in UK any help would be lovely.


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PostPosted: 30 Mar 2010, 10:21 
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Of course you can check with SpareTimeGizmos and see IF they have any boards left. But I'd say, an almost as big problem is obtaining sockets for PCB-mount and tubes.

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PostPosted: 30 Mar 2010, 12:39 
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Spare Time Gizmo is out of the boards. I got an email a while back from them asking for sources of the 6T9 tubes as there is not point of making more boards if tubes are hard to come by. Pointed him to the various sources people had noted on here but as Magnus noted, finding 6T9 tubes seems to be a bit of an issue.

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PostPosted: 31 Mar 2010, 08:01 
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You might consider contacting Spare Time Gizmos to ask them for there board files. If they were willing to let them go you may be able to have them custom made for you. Just a thought.

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PostPosted: 31 Mar 2010, 08:54 
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Slightly off topic: Noticed a few years ago that tubes like 12B4A and 1626 were to be found everywhere and were sold cheaply, and so was 6T9. But suddenly when demand increased prices went up.
I saw this in Russia as well. When AML published schematics for the Priboi amp rebuild, where he used 6N1P, prices for that tube went from 50 c to 5 $ on the electronic market outside St Petersburg.

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PostPosted: 31 Mar 2010, 12:18 
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booangler wrote:
You might consider contacting Spare Time Gizmos to ask them for there board files. If they were willing to let them go you may be able to have them custom made for you. Just a thought.
That didn't work!!! :( I sent an email this morning to the STG folks. No go on the Gerber files. At least I tried.

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PostPosted: 31 Mar 2010, 12:33 
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On the other hand, if you can grab a pair of 6T9s and sockets it is so easy to build an amplifier the traditional way.

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PostPosted: 01 Apr 2010, 14:37 
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Boolanger ,soundbrigade,thanks for your efforts,I didn't know the tubes were scarce either,well I'll start on my Mullard5/10 ULPP project instead,got some special trannies delivered,valves here too,just chassis to sort out ,any input on design welcome ,cheers peter


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PostPosted: 02 Apr 2010, 04:02 
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Tubes, here: http://www.vacuumtubes.net/prices.htm

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PostPosted: 03 Jul 2019, 09:00 
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Hello,
I have 8 of the Spare Time Gizmo PCBs and the tube sockets to go with them if anyone wants one.
J. P.


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