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Total 3 documents matching your query.

1. [AMPS] SB-1000 converson with QB 3.5/750 ??????? (score: 1): Author: pe1ogf@iaehv.nl (John Peters); Date: Sun, 29 Nov 1998 18:43:53 +0100; Hello All, For a friend of mine I need some info.. He blew out his 3-500Z......... Can anyone tell me if it is possible to put a QB 3.5/750 in a SB-1000 instead of the öriginal 3-500Z This QB 3.; /archives//html/Amps/1998-11/msg00369.html (7,597 bytes)
2. [AMPS] SB-1000 converson with QB 3.5/750 ??????? (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Sun, 29 Nov 1998 14:19:39 -0500; If that tube is functionally equivalent to a 4-400A it should work John. But that 750 designation makes me wonder a bit. In any case you may have to modify the bias circuit in order to obtain idle cu; /archives//html/Amps/1998-11/msg00370.html (9,233 bytes)
3. [AMPS] SB-1000 converson with QB 3.5/750 ??????? (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 29 Nov 1998 15:23:10 -0800; What is wrong with the tube? It should work if each of the three grid pins are RF grounded through at least 470pF per pin. The dc grid currents can be carried by two 1/2w 30 to 51 ohm resistors, one; /archives//html/Amps/1998-11/msg00376.html (8,045 bytes)

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