[ARC5] ARC-5 T-20 Frequency coverage and other questions

[Jay Coward via ARC5]

And this is why a BC-221-* is essential for SCR-274-N setups and LM-* is essential for ATA/ARA and ARC-5 setups. You have a pretty good frequency measuring instrument and more cool switches and dials to play with. INMHO a display setup would be delinquent without a frequency meter.
 Dave's tuning chart is reminiscent of the prior command sets of the Army Air Corps and the Navy.
Jay
 
 
-----Original Message-----
From: David Stinson <arc5 at ix.netcom.com>
To: AKLDGUY . <neilb0627 at gmail.com>; J Mcvey <ac2eu at yahoo.com>; ARC-5 List <arc5 at mailman.qth.net>
Sent: Thu, Jul 31, 2014 12:50 pm
Subject: Re: [ARC5] ARC-5 T-20 Frequency coverage and other questions


Moving the MO down a full MC would not give you 
KC-for-KC dial calibration.   As you go up or down in 
frequency, the change per degree of rotation also changes.
The T-20 covers 1300 KC for a full rotation.
The T-19 covers only 1000, so your dial calibration 
would not track over even a short range.

I have moved T-20 and BC-457 down to 80 mtrs before
but don't remember how much I changed the MO cap
or the PA padder.  I do remember I removed the lock screws
and I could move the MO down enough with a small screw
driver through the hole on the side, so it didn't need to go 
"full mesh."  Neither did the PA padder. 
 I put 4 MC at the "top" end of the scale and 
made a "tuning chart."  Worked well.

GL OM ES 73 DE Dave AB5S

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