Hi Pete,
Now I will give out a massive warning to anybody with ANY AMP. If you have
an amplifier that is PreWARC design and you decide to become a test pilot
and fire the unit up on 12 and or 17... YOU BETTER be very observant as you
bring up the power. As the Plate choke series resonates on any band it will
leave the amplifier.
My buddy had a PreWARC amp and the first time he fired it up on 17 the plate
choke left. A call to the manufacturer provided him with a NEW and Improved
choke that has lasted another 15 years without incident. He still doesn't
crank it up all the way on 17.
Since the amps (preWARC) were not tested there you are performing the
resonance test. You will know once it passes about 100 Watts or so.
BOB DD
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Pete Smith
Sent: Saturday, March 03, 2007 2:25 PM
To: Amps@contesting.com
Subject: Re: [Amps] Loading SB-220
I don't think that is correct either, Bob - I use my SB-220 on 12 and 17 in
the SSB position all the time. I'd be willing to bet that this advice is
based on having arced the tuning capacitor a time or two while finding the
right setting with the loading too light.
>Use LV position, and why is that Jay? I would agree to get within a
>reasonable setting with LV and pop her over to SSB... But why do you say
>stay with LV?
>
>BOB DD
>
>-----Original Message-----
>From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>Behalf Of Jay Musikar
>Sent: Saturday, March 03, 2007 1:33 PM
>To: Win; Amps@contesting.com
>Subject: Re: [Amps] Loading SB-220
>
>GA Win -
>
>1. Loading on the WARC Bands must be done in the
>CW/Tune Position.
>
>2. Do not operate the amplifier in the SSB position on
>the WARC Bands.
>
>3. 17m
>Band Switch - 15m
>Tune - Top of the 40m markings
>Load - 4.0
>
>4. 12m
>Band Switch - 10m
>Tune - 20m (just left or CCW)
>Load - 4.0
>
>The are a number of variation on which Band Switch
>Position to use and relative Tune and Load settings.
>
>In either case DO NOT use the SSB postion (HV).
>
>Good Luck es 73,
>
>Jay/AF2C
>
>--- Win <w0lz@winlyn.us> wrote:
>
>> Can someone comment on loading the SB-221 up on 18
>> and 24 MHz. using the
>> existing band selections. Will the input Z change
>> much? Which band switch
>> positions to use for each band? At the moment I am
>> really only interested
>> in 18 MHz. As conditions get better, I will
>> probably become interested in
>> 24 MHz.
>>
>> Thank you in advance.
>>
>> Win, W0LZ
>
>
>
>
>___________________________________________________________________________
_
>________
>Finding fabulous fares is fun.
>Let Yahoo! FareChase search your favorite travel sites to find flight and
>hotel bargains.
>http://farechase.yahoo.com/promo-generic-14795097
>_______________________________________________
>Amps mailing list
>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
>
>
>_______________________________________________
>Amps mailing list
>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|