[ARC5] CHART

[David Stinson]

I’m massively behind on emails again.


There are no “official” tuning charts for the ATA/SCR-274N/ARC-5 transmitters.

Installation aircraft varied a lot.  Many of our members have developed 

their own solutions for loading the 5-12 Ohm output of a Command Set 

transmitter into a ham-typical 50-Ohm load.

 

Mine is to use a fixed series capacitor from the antenna post to the 

center conductor of your coax- 100 pFd for 80M, 50 pFd for 40M.

Don’t remember what worked best on 160M but 500 pFd comes to mind.

 

I have bought these and similar:
https://www.ebay.com/itm/264179510255
https://www.ebay.com/itm/263611042663
https://www.ebay.com/itm/292457150295

 

Cheap and they work well.  Do not buy the Chinese blue ceramics.

They are worthless junk.  Silver micas also seem to heat and eat power.

Shop around because some of these high-Volt caps are

stupid expensive.

73 Dave S.

 

 

From: dennis via ARC5

To: arc5 at mailman.qth.net
Subject: [ARC5] CHART

 


does anyone have a Tuning Chart for the BC-696,459, & T-19,22 Transmitter thanks Dennis

 

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