[ICOM] Preamp delay time on 275H?

[Gary Fiber]

I think we asked that question to Icom, Inc when 
I was there.  At one time people wanted to use 
something other than the AG-25 and wanted that information.
Icom's tech support might know or have it on file 
or Scott Malcom. I  don't know if Bruce of 
SultanTronics would know. You could email all three and see if they do.

Seems to me it was pretty quick. The relays in 
the AG-25 were spring loaded. So in the normal 
position they bypassed the preamp. Under power 
the switched the RF through the preamp and also the preamp was powered.

I don't think its specified anyplace either in 
the 275 shop manual or on the AG25 leaflet.

Gary K8IZ

At 09:04 PM 6/28/2009, you wrote:

>Hello Icom List:
>
>                           Does anyone know the 
> keying rise time on TX when using the built-in 
> preamp switch feature on a 275H?  I have a 
> non-Icom preamp ready for installation and am 
> curious about the delay.  This preamp is able 
> to utilize the DC on the coax from the transceiver.
>
>73
>
>Warren NØWF
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Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident