[VHFcontesting] VHFcontesting Digest, Vol 208, Issue 11

[mikflathead at aol.com]

Thanks for all the input. I guess it is what it is. Mike


-----Original Message-----
From: Jay Baack <whereisjay at gmail.com>
To: vhfcontesting at contesting.com
Sent: Sat, Apr 18, 2020 1:17 pm
Subject: Re: [VHFcontesting] VHFcontesting Digest, Vol 208, Issue 11

I run one on 222.
Follow the same cooling steps as W7GJ has documented for the 6m version.
Use the same style power supply as well.
I run it at 45W and see 900-925W out.  Never needed to push it beyond that.
Even with 5 fans, after an hour of FSK441 skeds I see about 100W output
power drop - so I add extra cooling.

- Jay N1AV  DM43


O

> Message: 1
> Date: Sat, 18 Apr 2020 11:13:29 +0000 (UTC)
> From: mikflathead at aol.com
> To: "vhfcontesting at contesting.com" <vhfcontesting at contesting.com>
> Subject: [VHFcontesting] Harris amp on 222
> Message-ID: <2050173263.2595087.1587208409752 at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> Has anyone tweaked a channel 11 amp for 222 mhz?? I am using 2 modules in
> parallel. With 30 watts drive I am seeing 18 amps at 50 volts input. That
> would be 900 watts input. I am getting 400 out. Not very efficient. It
> makes a little more at 220 than 222. Thanks Mike
>
> ------------------------------
>
> Message: 2
> Date: Sat, 18 Apr 2020 08:13:36 -0500
> From: <ppattrsn at swbell.net>
> To: <mikflathead at aol.com>,      <vhfcontesting at contesting.com>
> Subject: Re: [VHFcontesting] Harris amp on 222
> Message-ID: <00bd01d61583$2bdd22a0$839767e0$@swbell.net>
> Content-Type: text/plain;      charset="UTF-8"
>
> Mike,
> Ron, K5LLL, has converted a Harris Chan ll amp to 222.  Here's a link to
> his Roadrunners Microwave Group presentation.
> https://k5rmg.com/harris-222-amplifier-ron-marosko-k5lll/
>
> 73,
> Pat, W5VY
>
>
>
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