Collins 30L1
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| Jun 28th 2014, 12:00 | |
PY2ALRTotal Topics: 0 Total Posts: 0 |
I have a parasitic oscilation in the Collins 30L1. I need some explanation how to cancel this oscilation. |
| Jun 28th 2014, 12:00 | |
PY2ALRTotal Topics: 0 Total Posts: 0 |
30L1 |
| Jul 1st 2014, 14:27 | |
W1VTSuper Moderator Total Topics: 0 Total Posts: 0 |
http://www.eham.net/ehamforum/smf/index.php?topic=70566.0;wap2 Tom W8JI suggests adding 20 or 30 ft of RG58 coax on the input of the amplifier to help stabilize it--as would a resistive attenuator. |
| Jul 1st 2014, 19:17 | |
WB1GCMSuper Moderator Total Topics: 0 Total Posts: 0 |
Collins supplied a specially designed RF interconnecting cable to use with the exciter of the 30L1; typically the KWM-1. This cable was special as it presented 50 ohms to the input circuits at all times. Also, on another W8JI related topic regarding the 30L1, the AC power cord and transformer have wiring issues that are potentially dangerous. Collins made some serious errors wiring the power transformer. For safety sake, please read the information on the following link to make sure your 30L1 isn't wired in a dangerous manner: http://www.w8ji.com/collins_30l1.htm |
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