Ferguson 391T Radiogram

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Ferguson 391T Radiogram

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Murphyv310

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Posts: 5,099
Location: Kilmarnock

#7

25-04-2017, 04:25 PM

The pentode of the PCF80 runs in starvation mode, stage gain is high like the 3-3 so there is quite high negative feedback. The only drawback being AC coupling to the output valves. Not only is this radiogram loud but it's quality is very good. Can't understand why if they insisted on a TV valve they didn't use the ECF80.

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Ferguson 391T Radiogram - by Murphyv310 - 24-04-2017, 07:32 PM

RE: Ferguson 391T Radiogram - by Murphyv310 - 25-04-2017, 01:08 PM

RE: Ferguson 391T Radiogram - by Geordie McBoyne - 25-04-2017, 02:12 PM

RE: Ferguson 391T Radiogram - by ppppenguin - 25-04-2017, 02:17 PM

RE: Ferguson 391T Radiogram - by pwdrive - 25-04-2017, 02:45 PM

RE: Ferguson 391T Radiogram - by ppppenguin - 25-04-2017, 03:45 PM

RE: Ferguson 391T Radiogram - by Murphyv310 - 25-04-2017, 04:25 PM

RE: Ferguson 391T Radiogram - by Geordie McBoyne - 25-04-2017, 07:23 PM

RE: Ferguson 391T Radiogram - by Synchrodyne - 26-04-2017, 01:17 AM

RE: Ferguson 391T Radiogram - by ppppenguin - 26-04-2017, 08:37 AM

RE: Ferguson 391T Radiogram - by Murphyv310 - 25-04-2017, 09:03 PM

RE: Ferguson 391T Radiogram - by Murphyv310 - 26-04-2017, 07:21 AM

RE: Ferguson 391T Radiogram - by Geordie McBoyne - 26-04-2017, 09:23 AM

RE: Ferguson 391T Radiogram - by Murphyv310 - 26-04-2017, 09:39 AM

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