zinwell sup2400 down converter

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markotime
Posts: 4
Joined: Mon Sep 17, 2018 5:07 pm

zinwell sup2400 down converter

Postby markotime » Mon Sep 17, 2018 5:15 pm

An article shows how to modify the sup-2400 to allow SDRs to receive signals above 2GHz.
I can't find specs on the unit and am wondering if the 100mA bias-tee of the RSP1a is adequate.
(Haven't received my RSP1a yet, jsut want to be ready).
thanks!

http://www.kd0cq.com/2016/04/part-ii-th ... -for-5-00/
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markotime
Posts: 4
Joined: Mon Sep 17, 2018 5:07 pm

Re: zinwell sup2400 down converter

Postby markotime » Thu Sep 20, 2018 6:03 pm

The sup-2400 wants 12vdc, but the internal 7805 regulator can be bypassed to allow 5vdc operation. I may experiment in the coming weeks. Love my RSP1A!
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Fractal1
Posts: 57
Joined: Sun Feb 21, 2016 6:06 am

Re: zinwell sup2400 down converter

Postby Fractal1 » Fri Sep 21, 2018 5:07 am

I'm very keen to have a go at one of those as well. Was going to order one already done from kd0cq, but it seems he has run into unfortunate difficulties and won't be selling any more units.
I look forward to seeing how you got on!!!

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markotime
Posts: 4
Joined: Mon Sep 17, 2018 5:07 pm

Re: zinwell sup2400 down converter

Postby markotime » Sat Sep 22, 2018 3:54 pm

IT was quite easy to modify. I used one of those inexpensive USB powered soldering irons, which has a very small tip (and comes with some very fine gauge solder). There is one component that needed a hotter iron to remove, adjacent the resonator (blue blob). I like wire-wrap wire for jumpers as the hot iron will melt thru insulation, handy for multi-point jumpering. The price is low enough to justify spare(s) to cover my oopses.
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Fractal1
Posts: 57
Joined: Sun Feb 21, 2016 6:06 am

Re: zinwell sup2400 down converter

Postby Fractal1 » Mon Sep 24, 2018 5:47 am

Awsome, any chance of some pics?

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markotime
Posts: 4
Joined: Mon Sep 17, 2018 5:07 pm

Re: zinwell sup2400 down converter

Postby markotime » Mon Sep 24, 2018 2:49 pm

Here's the mod article. Unfortunately, modified units are NOT for sale any more.
http://www.kd0cq.com/2016/04/part-ii-th ... -for-5-00/
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