[ARC5] CHART

[Michael Hanz]

Agree.  The only "tuning chart" I'm aware of is Table 6-5 in the 
AN/ARC-5 manual, but it assumes you are connected to the 5 ohm 100pF 
dummy load.  The Antenna Inductance and Antenna Coupling control 
settings would be different for a real antenna.

  - Mike  KC4TOS



On 2/13/2019 8:07 AM, David Stinson wrote:
>
> 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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-- 
Michael Hanz - KC4TOS

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