I guess it´s not for safety but for the qsk circuitry.´
In my amp I did something similar.
It would not work with a dc short from a beta match or similar on the
antenna output.
The closing of the antenna relay contact provides a DC path for the input
relay coil in my case.
73
Peter
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Martin Sole
Sent: Dienstag, 13. Februar 2018 06:08
To: amps@contesting.com
Subject: Re: [Amps] Series C in amp output
Okay, thanks to Bill and Steve I think we can say it's just a safety
measure in case of blocking cap failure. Maybe these amps don't have the
traditional RFC across the output. Never did like that idea, always
thought they looked a bit ineffective if faced with an amp or more at a
few kV.
Martin, HS0ZED
On 10/02/2018 00:48, Steve Wright wrote:
> It's just a safety DC-->antenna block, in case of HT badness in the tank
> circuity.
>
>
> On 09/02/18 23:06, Martin Sole wrote:
>> Amps from Acom and OM, maybe some others, have a large amount of
>> capacitance in series with the output after the power/SWR bridge. In
>> the case of the Acom 1000 this is 6 parallel 10nF/500v disc ceramic
>> capacitors with a 1 megohm (static bleed?) across them.
>>
>> Have not seen this configuration on older Alpha amps or others. Can
>> anyone comment on the purpose?
>>
>> Thanks
>>
>> Martin, HS0ZED
>>
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