Good ole analog

Gotta watch those Fresnel zones!
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RGORJANCE
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Re:NICOM STL PROBLEMS

Post by RGORJANCE » Sat Sep 17, 2016 9:37 am

I would be interested in hearing what you found in those Nicom units. I currently service two stations with those in use. Please tell us what you have seen fail. Ours are about 1.5 years old.

I believe there are several others in use in the group as well.

Fossil

level42
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Re: Good ole analog

Post by level42 » Wed Sep 21, 2016 7:23 am

Pretty much three consistent failures on the Nicoms:

1. Power supplies. Usually either a cap or a voltage regulator.

2. Output device in power amp. They have used a few different ones over the years. Not much protection from VSWR or lightning. Either will cook em.

3. Bad solder joints. Some of these boards must have been soldered by first time students at a local tech school. No quality control.

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RGORJANCE
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Re: Good ole analog

Post by RGORJANCE » Wed Sep 21, 2016 8:25 am

Thanks for the detail. I kinda was thinking it would be caps in the p/s. Appreciate the tips.

Fossil

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kkiddkkidd
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Re: Good ole analog

Post by kkiddkkidd » Sat Sep 24, 2016 6:33 am

level42 wrote: The Armstrong X-Link are my favorite of the current analog products.
Is it the X-Link that has a 2 and 4 channel discrete STL on a single STL freq?
--
Kevin C. Kidd CSRE/AMD
WD4RAT
AM Ground Systems Company
http://www.amgroundsystems.com
KK Broadcast Engineering
http://www.kkbc.com

TPT
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Re: Good ole analog

Post by TPT » Sat Sep 24, 2016 1:21 pm

Not that I know of. My units consist of a simple analog TX/RCV pair I feed with a composite audio signal.

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Shane
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Re: Good ole analog

Post by Shane » Sat Sep 24, 2016 7:55 pm

Sounds like one of the late 90's Moseley products.
Mike Shane, CBRE
---Omaha---

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kkiddkkidd
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Re: Good ole analog

Post by kkiddkkidd » Sun Sep 25, 2016 5:15 am

level42 wrote:Pretty much three consistent failures on the Nicoms:

1. Power supplies. Usually either a cap or a voltage regulator.
2. Output device in power amp. They have used a few different ones over the years. Not much protection from VSWR or lightning. Either will cook em.
3. Bad solder joints. Some of these boards must have been soldered by first time students at a local tech school. No quality control.
I have one of the old 2ru tx's that has had the output device replaced a couple times and they now tell me that it is unobtainium. The last time I had it repaired, I seem to recal that they had to use a similar but not exact device and it would only make about 7 or 8 watts. That worked for a while but it will now only make about 2w. I have been using it as is for a loaner and it seems to be stable at that.

I also have a 2ru RX that won't lock on certain freqs. Anything that can be done for that?

Later,
--
Kevin C. Kidd CSRE/AMD
WD4RAT
AM Ground Systems Company
http://www.amgroundsystems.com
KK Broadcast Engineering
http://www.kkbc.com

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kkiddkkidd
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Re: Good ole analog

Post by kkiddkkidd » Sun Sep 25, 2016 5:26 am

Shane wrote:Sounds like one of the late 90's Moseley products.
Very similar.

I just found what I was thinking of in Armstrong's online literature. It is the Armstrong DX series of 2 or 4ch encoder/decoders but I don't find a single reference to that model at any of the on-line dealers. Was it vaporware?
--
Kevin C. Kidd CSRE/AMD
WD4RAT
AM Ground Systems Company
http://www.amgroundsystems.com
KK Broadcast Engineering
http://www.kkbc.com

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