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Total 9 documents matching your query.

1. [Amps] PROBLEM WITH HUM (score: 1): Author: Bob Gibson <w5rg@yahoo.com>; Date: Mon, 10 Nov 2008 10:29:31 -0800 (PST); Hi..I have built a YC156 amp and I have a problem with hum in the audio..I key the radio in SSB with the amp in line but not keyed and I get this hum and its coming from the filament transformer..I o; /archives//html/Amps/2008-11/msg00095.html (7,003 bytes)
2. Re: [Amps] PROBLEM WITH HUM (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 10 Nov 2008 10:52:13 -0800; audio..I key the radio in SSB with the amp in line but not keyed and I get this hum and its coming from the filament transformer..I opened it up and disconnected the filament transformer then again k; /archives//html/Amps/2008-11/msg00096.html (8,334 bytes)
3. [Amps] problem with hum (score: 1): Author: Bob Gibson <w5rg@yahoo.com>; Date: Mon, 10 Nov 2008 11:05:14 -0800 (PST); The transformer is 120 volt..input is 2 wires..one to ground and other to 110 volts..This may be a problem..Thanks Bob _______________________________________________ Amps mailing list Amps@contestin; /archives//html/Amps/2008-11/msg00097.html (6,435 bytes)
4. Re: [Amps] PROBLEM WITH HUM (score: 1): Author: "k7rdx" <k7rdx@charter.net>; Date: Mon, 10 Nov 2008 12:49:13 -0800; The YC-156 will not work with conventional center tap B-.B- needs to be brought to the cathode seperately thru an rf choke similar to 8877 designs.Using center tap connection will cause filament modu; /archives//html/Amps/2008-11/msg00098.html (8,453 bytes)
5. Re: [Amps] PROBLEM WITH HUM (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 10 Nov 2008 13:23:32 -0800; Possible hum problems are associated with improper wiring of the PRIMARY of the transformer. You comments apply to the SECONDARY of the transformer, and are not relevant to this discussion. 73, Jim K; /archives//html/Amps/2008-11/msg00099.html (7,580 bytes)
6. Re: [Amps] PROBLEM WITH HUM (score: 1): Author: "k7rdx" <k7rdx@charter.net>; Date: Mon, 10 Nov 2008 13:31:13 -0800; I understand that Jim...Just a trouble shoot for those who want to know...You,obviously don`t care...Jim..K7RDX.. -- Original Message -- From: "Jim Brown" <jim@audiosystemsgroup.com> To: <Amps@contes; /archives//html/Amps/2008-11/msg00100.html (8,441 bytes)
7. Re: [Amps] problem with hum (score: 1): Author: Gudguyham@aol.com; Date: Mon, 10 Nov 2008 17:59:22 EST; The transformer is 120 volt..input is 2 wires..one to ground and other to 110 volts..This may be a problem..Thanks Bob Ground (chassis ground) should NEVER be used as a neutral, bad practice as well; /archives//html/Amps/2008-11/msg00108.html (8,025 bytes)
8. Re: [Amps] PROBLEM WITH HUM (score: 1): Author: Gudguyham@aol.com; Date: Mon, 10 Nov 2008 18:00:50 EST; I opened it up and disconnected the filament transformer then again keyed and no hum..I have tried grounding all kinds of ways and still hum..Would some beads help out? Thanks Bob W5RG How can you te; /archives//html/Amps/2008-11/msg00109.html (8,059 bytes)
9. Re: [Amps] PROBLEM WITH HUM (score: 1): Author: Norman Hockler <sanorm@columbus.rr.com>; Date: Mon, 10 Nov 2008 19:57:57 -0500; Your hum is coming from the SECONDARY of the transformer. See K7RDX response. He is absolutely correct Norm N8NH _______________________________________________ Amps mailing list Amps@contesting.com; /archives//html/Amps/2008-11/msg00113.html (8,588 bytes)

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