- 475 Posts. Joined 2/2004
- Location: New York
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Originally Posted by Kevin Gilmore
There are 2 pots per channel.
One of them is the differential pot, and you
put a voltmeter between The two output pins
and adjust for zero. I believe this pot is labeled TVR1
For left channel voltmeter goes between yellow and green
for right channel it is white and red
The other is the dc offset pot, you put a voltmeter
on either output pin and ground and adjust for zero.
I believe this pot is labeled TVR2. For left channel voltmeter
goes between yellow and ground, for right channel it is
white and ground.
You have to do this a number of times, and new tubes
drift like crazy.
Originally Posted by Stax-i-nox
Dan, thanks for the suggestion...what about the Gilmore amp with the Blue Hawaii output tubes?
|Spritzer, are those directions for biasing a t1?|
Originally Posted by Carl
Kevin Gilmore is coming out with a new hybrid amplifier soonish (I believe called the KGST) to replace it, but it's anyone's guess when it'll be finished.
Originally Posted by Hirsch
If you want tubes for Stax amps using the 6FQ7/6CG7, try this eBay seller:
The Raytheon 6FQ7 is Japanese made, and appears to be Toshiba manufacture. This tube is the standout in my SRM-007t, and has a more natural sound that any of the "premium" NOS I tried (GE, RCA cleartop, Mazda-Brimar, Sylvania, Tung Sol, etc.). Price is extremely cheap for a NOS tube ($5.80 ea). I don't think all that many people know about these (at least not until I posted this). Since SRM-T1 only uses two tubes, the same seller has several auctions going on eBay for pairs that are priced even lower to start that might be useful. I have bought from this seller in the past, and his tubes have always been exactly as advertised. I have no affiliation with the seller or the auction except as a customer.
I don't know how to bias the SRM-T1, but you will need well-matched tubes to bias an SRM-007t.
Originally Posted by Salt Peanuts
If I'm not mistaken, the KGST design has been finished for some time. It's just a matter of someone actually making them available for purchase, as Kevin Gilmore does not make amps for sales. It probably doesn't help that the market for an electrostatic amplifier is rather small.
I just read your views re Raytheon tubes for Stax T1 which you posted a few years ago. i am tossing between toshiba NOS at $50 a matched pair n mazda by Brimar at twice the cost.
From your experience between the two ,can you pease give me a brief run down on their sound characterstics? I like a mesty sound yet open n good top end clarity. Many thanks.