SDS200 Scanner?

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Pumper_50
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Joined: Tue Nov 15, 2011 10:11 am
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Re: SDS200 Scanner?

Post by Pumper_50 » Sat Feb 01, 2020 8:21 am

railscan wrote:Some observations if I may.

The lead up to the release of a new scanner can and does generate a considerable amount of excitement which in turn manifests itself often creating hyperbole.

Accordingly some consumers believe the rhetoric and the scanner takes on magic or mystical properties. Simply they expect more than the device can deliver. Just have to remember that it is wide band unprotected receiver and should be treated as such.

Enjoy it and remember that it cannot perform miracles.

R
So it won't make me a cup of tea?

Bugger!

Sent from my SM-G960F using Tapatalk

Regards,
Pumper_50

http://vicradiozone.com

railscan
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Re: SDS200 Scanner?

Post by railscan » Sat Feb 01, 2020 1:18 pm

[/quote]So it won't make me a cup of tea? Bugger![/quote]

Its American, coffee only.

R

Pendulum
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Re: SDS200 Scanner?

Post by Pendulum » Wed Feb 19, 2020 11:39 pm

sorry to rebump this thread, A/V and Data Tas are selling the SDS200E for $1299. email radios@avdatatas.com I am the owner of the business. we make next to nothing on them after postage, import taxes and then adding an AU power supply. but I know there are some that want to have them and I did all the hard yards to offer them to you all

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VK3RX
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Re: SDS200 Scanner?

Post by VK3RX » Sun Feb 23, 2020 2:59 pm

Recall a few posts back I mentioned that my recently purchased SDS200 from the U.S. has the hum/digital noise.

A PM exchange with another member prompted me to pull the covers off and see if the NMP200 part had been installed by the factory, and it had been.

Posts on RR mentioned that the part may or may not make good contact between the chassis and an internal cover. One mod is to install some copper tape on the top of the part and the internal cover to improve contact.

Below are a few pix of what I did. The copper tape I have is adhesive backed, hence folding it over on itself for continuous contact from front to back. Keeping it's backing tape on adds to the overall thickness. The tape was trimmed to width about 15mm, and the narrow folded portion is about 8mm. It's firmly wedged behind the NMP200, and isn't going anywhere.

The hum/digital noise has now almost disappeared - only audible at a very low level if I put my ear within about 100mm of the speaker. Here's hoping this fix is permanent.
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VK3RX
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Re: SDS200 Scanner?

Post by VK3RX » Sat Mar 14, 2020 6:37 pm

Since almost a month has elapsed I thought I'd provide an update.

The copper tape fix proved to be temperature-dependent. When the unit is first powered up - cold - the noise is only apparent within a couple of inches of the speaker. However when it warms up the noise increases, not quite to the original level with just the Uniden fitted part, but audible out to a metre or so.

So I decided to do one of the permanent fixes described on RR, the one involving the removal of lacquer from the front printed circuit board at the mounting screws locations. This mod is one way to solve the grounding issue that causes the hum, which the Uniden fitted part NMP200 may or may not achieve.

I had wondered about doing nothing until the warranty ran out, but decided to investigate anyway. The mod isn't for the faint-hearted or inexperienced with electronics.

Removal of the front panel and detaching the printed circuit board wasn't as straightforward as I thought it would be from RR pix and descriptions, but I got there and completed the fix without any issues.

Suffice to say that I was relieved and pleased that after reassembly 1) the unit booted up as it should and everything worked, and 2) the hum/noise is completely gone and hasn't returned, no matter what the temperature :D

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