[Milsurplus] ARC-1 to ARC-4 QSO

[Pete Williams]

G 'day  list...I sometimes wonder how, with all current technical knowhow,
it seems so difficult to make WW2 radios establish 2 way comms even over
moderate distances
A couple of struggling  guys out our way had great trouble getting out on 80
M over a few miles using ground support field radios and they were the full
bottle on ability.
If such reliability /performance existed in  a real sit.one can only hope
the carrier pigeons  were well fed and on standby.

Cheers
Pete VK3IZ

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Marty Reynolds
Sent: Wednesday, September 24, 2008 10:03 PM
To: robandpj at earthlink.net
Cc: Chris Nardi; mrca; milsurplus
Subject: Re: [Milsurplus] ARC-1 to ARC-4 QSO


> After some crystal grinding to get the rigs on the same frequency, a QSO
> was made between K2WI/m using an ARC-4 in the car, and WW2Y using an ARC-1
> at the K2WI base, over a 2-mile terrestrial path.
>

Big 'Way To Go!!

> Further work needs to be done to boost the modulation of the ARC-1.  K2WI
> had to pull over and turn off the car to hear WW2Y from the speaker.  The
> next thing to be checked is the cathode bypass cap on the modulator tubes.
>

You're onto something  If cap open-circuit there's implicit negative
feedback
w. attendant gain reduction

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