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It sounds just like a good old power line arc. I doubt it is more than a couple of miles away. It could be a tree limb touching the primary. Most likely it'd a defective bell or mushroom insulator. As

I'm assuming the purpose built box is built for a higher duty cycle... vs mobile rig never intended for a high duty cycle re-purposed into a repeater. Now, that being said... Once you open up some of

I found these 2 Porta-Peater Instant Repeater ads from 73 Magazine. Spent an hour searching with no success finding the manual. [image: image.png] [image: Porta-Peater 73 Magazine March 1982 page

Skyler Fennell asked: Would anybody happen to have a figure here: What is the typical natural environmental noise floor ( for standard 5KHz deviation FM bandwidth) for the 2 meter band vertically

According to their ad, it was VOX or COR. The ad can be seen here: https://worldradiohistory.com/hd2/IDX-Short-Wave/archive-73-idx/idx/80s/73-magazine-11-november-1982-OCR-Page-0141.pdf *Carl –

John, On initial listening it sounded like it could be a power line issue causing an arc - but the more I listened you can clearly hear it is data of some type, possibly TDMA data or similar due to

Yikes, take your audio response out to 5khz Bob? Maybe on a link where you are your own customer but in the mobile relay band I think you are pushing it. You guys have no guard band out there in socal

What seems to be getting lost in this discussion is that everyone has a different perception of what makes a repeater "excellent", & as such may have a different set of priorities when evaluating the

Dan, I knew a Motorola (or Harris) solution was probably going to be the result of my query. L.M.A.O. I've heard your "sales pitch" before, having sat through similar sales and engineering briefings,

Most of us on this list are advanced to expert level in repeater design, installation, acceptance testing, performance verification, operation and site environmental considerations. Although you

Hi John, I noticed you are centering in on the repeater's input. I doubt that's the strongest frequency (that would be like winning the reverse lottery). Look around elsewhere. and probably, you may

Hi John, I listened to the audio and noticed a few things. Each pulse is fast rise/fast fall, 2 or 3 strengths, random, but in spread clusters. Almost like static discharge. Area of coverage suggests

I would agree with that. Environmental noise is almost always above top quality high performance receiver noise floors, so therefore your definition of desense would be occurring, even on a receive

Gale, A friend of mine had one of these early "repeater controllers" that was intended to take two mobile radios (of that era) and make a portable repeater for emergency use.? As I recall, it's a

I accept your apology and look forward to properly educating by using facts backed up by solid engineering.? We all have opinions, but not many of us have the ability to write in a manner that's

I'm looking for a copy of the documentation that came with a device called Port-A-Peater, built by a company called W-S Engineering located in Pine Hill, NJ.? A quality control tag on the inside of

I started this thread and as a relative noob in this area I have appreciated the discourse as to grades of repeaters and some of the issues that come up more often in some than others. Different

I haven't found a way to edit a post. The 2007 Allied catalog lists the series 251 as a diameter of 0.095. Lead diameter 1/16 to 10A 0.025 and 12 to 15A 0.032 The current series 251 are fatter.than to

On my previous post before that I mentioned both environmental / site noise and transmitter noise. I was corrected by David McGough that desense is only defined as degradation due to your transmitter,

John, A few questions: 1) Do you have an attenuator to put between the antenna of the 2nd video and the receiver? This would allow you to narrow the directivity of the source. 2) Have you explored the