>>Another possibility for the 990 might be to route the key closure
>>directly from the key jack to the rear ACC socket. A couple of steering
>>diodes should ensure that the amp gets the PTT signal in real time,
>>while the 990 can still hold the PTT line down for a few extra ms on un-
>>key.
>
>Delaying relay break could cause a problem. Relays need to open quickly,
>as well as close quickly (contact bounce time included). If the relays
>do not open blazingly fast, the next burst of RF could arrive when the
>contacts are bouncing.
All transceivers have some break delay, in order to avoid hot-switching
their own internal TX/RX systems. My suggestion would not affect the
existing break timing - it would only speed up the make signal getting
to the amp.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.com/g3sek
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