RSP2 Pro Bonding

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Mike2459
Posts: 322
Joined: Mon Jul 24, 2017 8:24 pm

RSP2 Pro Bonding

Postby Mike2459 » Mon Dec 17, 2018 3:50 am

Yesterday I started reading "A Ham's Guide to RFI, Ferrites, Baluns, and Audio Interfacing" (http://audiosystemsgroup.com/RFI-Ham.pdf). In it Jim Brown discusses the 'Pin 1' problem, a worthwhile read IMO.
Soo, I decided to take a look inside my RSP2 Pro. Screwdriver in one hand, a Fluke in the other, I began attacking the RSP2 Pro. After some needle point probing, It turns out the upper half of the steel case had no electrical continuity with the bottom half. Although there were 4 steel screws joining the two halves together, the beautiful powder coating turned out to be a very good insulator. A couple minutes work with a Moto-Tool electrically reunited the two halves - they are much happier together now. Electrical noise that was present before is still visible in the spectrum. But, its magnitude is not as great as before. Which reminds me of Neil Armstrong's statement when he set foot on the moon about small steps.
As to the Pin 1 problem, that's for another day.

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Roger
Posts: 217
Joined: Fri Dec 29, 2017 7:59 pm

Re: RSP2 Pro Bonding

Postby Roger » Mon Dec 17, 2018 5:24 pm

Mike,

Thanks for posting this. Very interesting and I will have to check my RSP's.

What were the frequencies where you saw the moist noise and reduction?

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Mike2459
Posts: 322
Joined: Mon Jul 24, 2017 8:24 pm

Re: RSP2 Pro Bonding

Postby Mike2459 » Mon Dec 17, 2018 6:51 pm

On the VHF Sat band (137-138 MHz), got about 3 to 4 dbm lowering of the noise floor. Did not notice any difference on low HF, (around 80M). Unfortunately, I don't have any historical data to make a comparison. The RSP2 is located about 3.5 ft from the PC.

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glovisol
Posts: 638
Joined: Thu May 10, 2018 6:42 pm
Location: Piedmont, Italy

Re: RSP2 Pro Bonding

Postby glovisol » Wed Dec 19, 2018 8:11 am

MIKE, SIMPLY EXCELLENT, THANKS!! Great wealth of information and of inspiration.....

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