[ARC5] BC659 dummy load

[Dave Jackson]

All:

TM11-615 for the SCR-609A/B and SCR-610A/B calls for a 1/2 wave antenna- a
fairly high impedance depending on the configuration.  There is an internal
matching network to make it look like 1/2 wavelength at the system center
frequency (app. 32.5 MHz)

Page 91, paragraph 127: Minimum Test Requirements calls for a minimum of 1
watt to the antenna also using a 300 ohm resistor in series with an r.f.
milliameter on the 0-100 scale.  Figures out to be about 57 ma for just the
300 ohm resistor.

Hope this helps,

Dave, WA4OBJ

-----Original Message-----
From: ARC5 [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Richard
Knoppow
Sent: Thursday, June 16, 2016 11:34 PM
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] BC659 dummy load

    I am not familiar with this transmitter. If 30 ohms the power would be
on the order of 13 Watts, does that sound right for it?  300 ohms would be
close to 130 Watts.

>>     On 6/16/2016 8:26 PM, WA5CAB--- via ARC5 wrote:
>>     >The only place in any of the literature where I find the use of a
dummy
>>     >load mentioned is in TM 11-4023, page 26, paragraph 28.  It says
that to
>>     >check the transmitter output power, use a 300 ohm resistor in series
>>     >with a 0-100 RF milliammeter.  Minimum reading on both channels
>>     should
>>     >be 65 mA.
>>     >
>>     >Robert Downs - Houston
>>     >wa5cab dot com (Web Store)
>>     >MVPA 9480
>>     >
>>     >In a message dated 06/16/2016 17:12:51 PM Central Daylight Time,
>>     >arc5 at mailman.qth.net <mailto:arc5 at mailman.qth.net> writes:
>>     >>Don't need the military one , but just what the resistance is
supposed
>>     >>to be. Anybody know?
>>     >>
>>     >>
>>     >>Jim
>>     >>Ac2EU
>
>
>     Robert & Susan Downs - Houston
>     wa5cab dot com (Web Store)
>     MVPA 9480