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@aol.com
> To: "vhfcontesting@contesting.com" <vhfcontesting@contesting.com>
> Subject: [VHFcontesting] Harris amp on 222
> Message-ID: <2050173263.2595087.1587208409752@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@swbell.net>
> To: <mikflathead@aol.com>, <vhfcontesting@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
>
>
>
_______________________________________________
VHFcontesting mailing list
VHFcontesting@contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting
|