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Interstage and output xfmrs for 38-690
#5

Well, reconsider: there is that capacitor, and it is 1uF in the sch, so say at 10kHz the series impedance of it with 8 ohm active is about 18.5 ohm so it reflects as 3,126 ohms which is closer to that 4K the 6F6 triode likes to see. So maybe the Interstage is ok.

Also, the ratio of the DC resistances is also different, in the original the primary to driver windings is 475/260 (in reality the two halves are 273 and 290 ohms) which is 1.8, and the new is 179/69 which is 2.6. But knowing not what gauges are there this, again, means nothing.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.


Messages In This Thread
Interstage and output xfmrs for 38-690 - by morzh - 09-04-2017, 08:21 AM
RE: Interstage and output xfmrs for 38-690 - by morzh - 09-04-2017, 06:42 PM



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