[ARC5] ARC5 CW Question

[Jim Falls]

Spotting - the TCS is set up with a MO TEST position so you can synchronize the RX and TX. You can scan to an active station (AM / CW), then tune the TX to match. Definitely not a "search and pounce" contesting  rig, but I love running it. 

Cheers!
Jim K6FWT 

> On Jun 23, 2014, at 21:12, "David Stinson" <arc5 at ix.netcom.com> wrote:
> 
> 
> ----- Original Message ----- From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
> 
>>> How did they come on frequency when they used these things in World War 2?
>>> I suspect they used a BC 221 or similar prior to the mission and locked the
>>> frequency in. So they really didn't have the spotting problem during a mission?
>> 
>> Usually, the transmitters and the receivers were on quite different
>> frequencies.
> 
> Respectfully, Ken:  That was only true when flying "range."
> In that case, the aircraft would transmit on something like
> 3105 KC and the Tower would respond on LF 286 KC
> or similar.
> There was no "spotting" because the Command transmit freqs
> were fixed before the mission and never changed by the Pilot.
> If any change was needed, the Radio Op did it with the -221.
> On combat missions, the Radio Operator used the BC-221
> or LM before take-off to set the Command Sets
> to assigned simplex frequencies and left them there.
> If the aircraft was flying from one base to another rather
> than returning "home," the Radio Op could use the -221
> to reset the Command Sets to the new channels or
> to the Army Airways 4 MC channel or
> to "range" freqs as needed.
> 
> In my sets, I installed a "SPOTTING" switch by
> simply breaking the receiver muting relay circuit so that
> the receiver audio stays "on" during transmit.
> Won't hurt the receivers.
> Turn down the gain, zero-beat the transmitter to the receiver
> and flip the switch back.. Works well for me.
> 
> 73 DE Dave AB5S
> 
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