Mahlon, I don't know the whole story, but I do know that my GSB-100 also had a 12AT7 in place of the 12AV7 when I acquired it. I can guess that it was a popular substitution because (1) the AT7 is a helluva lot more common than the AV7, and (2) it worked. I tried a 12AV7 in mine (I had exactly one in a junk box of hundreds, maybe thousands, of tubes) and there was no noticible difference in the XTAL osc. output.
Enjoy the GSB-100 on SSB, and even AM, but there are much better choices of transmitters available for the latter. 73, -Larry/NE1S Mahlon Haunschild wrote: > > Hello, list. This question isn't exactly AM-related, but the equipment > in question is in the same vintage so I guess it's OK (besides, I do > plan on at least TRYING AM on it eventually) anyway, here goes: > > Just acquired a Gonset GSB-100 transmitter over the weekend, and > everything appears to be in order with it except for the crystal > oscillator tube (V10). The book lists a 12AT7 in this location, but the > book's schematic and the transmitter itself show a 12AV7 instead. WHich > is correct? These two tubes aren't nearly the same, but on the other > hand the transmitter works, so should I just not worry and be happy? > > -- > regards, > > Mahlon - K4OQ > ------------------------------------------- Introducing NetZero Long Distance Unlimited Long Distance only $29.95/ month! Sign Up Today! www.netzerolongdistance.com
