[Amps] How to Bypass TR circuitry in Alpha 86

[Mark - N5OT]

An Icom 746 PRO.  Conventional transceiver.  Same radio, same amp, since 
2005.

Mark N5OT


On 2/11/2020 5:26 PM, Jim wrote:
> What are you driving it with?
>
>
> Thanks
> 73
> Jim W7RY
>
> On 2/11/2020 12:02 PM, Mark - N5OT wrote:
>> Hello Power People,
>>
>> I have an Alpha 86 where something has failed resulting in a fault.  
>> Since this failure mode began very shortly after the amp received the 
>> newer and stouter PIN diodes, and the amp was not subjected to 
>> excessive abuse, I believe the control circuitry itself may be wonky. 
>> I would like to take my chances, bypass the internal TR circuitry and 
>> also the control circuitry, and use an external TR switch I have on 
>> the shelf (Ameritron QSK-5).
>>
>> Unfortunately 100% of the time at the first dit the control circuitry 
>> bounces the amp out of transmit mode rendering it unusable.  I would 
>> like it to stop doing that.  I fully understand the risks and am 
>> willing to take them.
>>
>> Suggestions?
>>
>> 73 - Mark N5OT
>>
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