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Old 25th October 2011, 08:17 PM   #1
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Default Double parafeed

I'm fooling around with some thought of parafeed, but alas I am a poor man, therefore I don't usually build a whole new amp unless I'm fairly certain it'll sound good. Or at least work at all.

I'm wondering would it be possible to have two (2) outputs from a parafeed power stage. To clarify: one tube, cathode biased (/w LEDs), choke on anode, two 4.7F Solen caps from anode of tube, one transformer between each cap and ground (or cathode).

The other transformer would be say 5K : 4R, to drive a bass cone speaker, the other a P-P transformer in reverse, 4R : 10K to drive an ESL tweeter.

Probably not the most elegant or otherwise best system, but if this would work it'd be very cheap!

Any thoughts?

Last edited by MrCurwen; 25th October 2011 at 08:20 PM.
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Old 25th October 2011, 08:49 PM   #2
Gluca is offline Gluca  Italy
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No, the tube would see a very low impedance (4R from the ESL tweeter).
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Old 25th October 2011, 08:58 PM   #3
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The impedance reflected by a transformer depend on what is on the other side - the ESL panel is basically an open circuit, a capacitor. In reality it however has a very high impedance or so I've understood. Therefore it would reflect much more than 4R to the other side of the transformer.

Has it been done? Can you put a low impedance primary in a parafeed circuit with an ESL panel on the other side?
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Old 25th October 2011, 09:11 PM   #4
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Last edited by Frank Berry; 25th October 2011 at 09:15 PM.
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