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

J Mcvey via ARC5 arc5 at mailman.qth.net
Thu Jul 31 14:31:56 EDT 2014


Well, I checked that against some other dials and you're right...and that sucks!
If variable caps are the same size, maybe I could use an 80 meter ARC dial?



On Thursday, July 31, 2014 8:06 AM, David Stinson <arc5 at ix.netcom.com> wrote:
 


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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