- 1. [Amps] TL922 AMP PROBLEMS (score: 1)
- Author: brianmiller@xtra.co.nz (Brian Miller)
- Date: Tue, 8 Oct 2002 10:29:11 +1300
- Hi all The ZL6QH team is using a TL922 amplifier which has developed some problems over the past 9 months. Here is a chronological summary of the events. Note that I have not personally observed all
- /archives//html/Amps/2002-10/msg00057.html (8,865 bytes)
- 2. [Amps] TL922 AMP PROBLEMS (score: 1)
- Author: 2@vc.net (Rich)
- Date: Tue, 8 Oct 2002 04:07:54 -0700
- 50Hz reduces the fan speed compared to 60Hz. Was the perforated black baffle next to the tubes in place? Was the 922 used on RTTY? **
- /archives//html/Amps/2002-10/msg00060.html (9,984 bytes)
- 3. Fw: [Amps] TL922 AMP PROBLEMS (score: 1)
- Author: brianmiller@xtra.co.nz (Brian Miller)
- Date: Tue, 8 Oct 2002 14:05:53 +1300
- Hi Rich OK about the fan speed and, yes, the black baffle was in place. The amp has not been used on RTTY but I suspect it has been pushed to the limit in CW and SSB contests. Thanks and 73 Brian ZL1
- /archives//html/Amps/2002-10/msg00063.html (10,531 bytes)
- 4. [Amps] TL922 AMP PROBLEMS (score: 1)
- Author: 2@vc.net (Rich)
- Date: Tue, 8 Oct 2002 15:44:40 -0700
- thanks. A DC brushless fan operated from a rectifier/dc-filter connected to the 11Vrms fil winding would give more cooling for berserko contesting. cheerz
- /archives//html/Amps/2002-10/msg00069.html (11,067 bytes)
- 5. [Amps] TL922 AMP PROBLEMS (score: 1)
- Author: elmore@nssl.noaa.gov (Kim Elmore)
- Date: Tue, 08 Oct 2002 09:38:55 -0500
- A quick note about using DC brush-less fans: At least some types have little DC-to-AC inverters in them, and the fan motor really runs on AC (a few kHz, I think). In my case, I found the inverter was
- /archives//html/Amps/2002-10/msg00071.html (13,279 bytes)
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