Aside from the adapter that allows a 6GH8A tube to be substituted for a 7199, is there another option? All I can find are NOS or used on ebaY and they're a bit pricey, not to mention scarce. I seem to have need of these frequently in the Hammond H-series amplifiers. Thanks in advance for any advice.</P>
A Google search for your question led me to a guitar site: Their answer; "7199 - combination pentode/triode used as a one-tube voltage amp/phase inverter/driver for a pair of output tubes in some Ampeg amplifiers Note: These were once popular, but are now getting rarer and more expensive. There are a number of other pentode/triodes that can be substituted, but the pinouts are different and this will require require rewiring the socket for the tube. Examples are the 6AN8 and the 6U8."</P>
The socket adapter you mention was a round about for the rewiring mentioned. Theater Organs.com used to have a tube link and I think I remember tubes being offered by Organ Service Corporation. Some professional Ebayers are out of site on these rarer tubes. I buy tubes from people who are parting whole organs at a better price on many ocassions. Just let all my Hammond tubes go with the sale of my M103 so I don't think I have any 7199's right now or I'd be glad to help.</P>
Thanks, OR4M. It was just a wild hope I had that someone knew different. I now have two H-series of my own and another that I've been working on for someone else. Each of these organs uses three of the 7199's as pre-amp tubes in the main amp and none of them give areally strongreading on the tester. That translates to some serious $$$ to replace them.</P>
Last month I bought a Wurlitzer 4460 off of ebay and had the seller gut it for me mainly for the 12FQ8 tubes I needed to restore my model 4100 spinet. Buying individual tubes for something like this would have been out of the question for me.</P>
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