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If you can make it to Dayton in May there will be lots of those duplexers there cheap. Last few I bought were under $50 and they work fine.

Swap the TX and RX decks...replace the piss poor fabric under the heatsink on the TX..use artic silver....run power lower at 30 instead of 40watts .. Chris WB5ITT [email protected]> wrote:

Yup, Jeff, that was my suspecition as well; reason I reached out.? Thanks guys for the input. I'll keep looking. It's for our new fusion repeater at a site that has little population in these bands.

I am resurrecting an XPR8300. The TX board is scorched. Board #: MOTOTRBO U1-HP 8486777Z14-C UHF Ham Range Does anyone have a parted-out XPR8300 willing to sell the TX board to me? The poor

Steven, Receivers provide "selectivity" at various stages - and each have different purposes. The front-end is selective, and operates at the fundamental operating frequency.? The front-end

The OP has inquired how to improve input selectivity - not I-F selectivity.? Go back and re-read the inquiry. Kevin W3KKC

Never mind, I looked it up and its a custom 10.7MHz crystal filter using four discreet crystals. If you have the equipment you could sweep it for response then shop for a packaged filter with better

Can you post the current IF filter mfr and model #?

Your helicals should already be much narrower than that. What problem are we trying to solve? Andy Zorca WJ9J [email protected]> wrote:

Hello Everyone, Let me first say this is an experimental improvement to see it will work.? ? I have a hamtronics reciver board that is running in the 220MHZ space.? ? ?It's one the last board

Basic NOTCH ONLY duplexer. Yes you can get -80+ with careful tuning. Very popular with most two-way shops that are selling simple on-site systems. Milt N3LTQ Quoting "Karl Shoemaker via

for myself personally those have always worked very well. No issues with desense. jonnny kf6phx ________________________________ Sent: Tuesday, April 8, 2025 9:17 AM To: [email protected]

I do know these can be had for much less than the nearly $400.00 I see that one going for. Gregg Wardlow Sent: Tuesday, April 8, 2025 12:18 PM To: [email protected] Subject:

* Anyone know if this is an okay one for 5 MHz spilt? I need at least 80db of notch (isolation) * Supposedly, it's a Moto. I'm shopping for one. I don’t have one to test, I’m a bit

Made by EMR and will do 5MHz split. $75 range would be a better price.

Anyone know if this is an okay one for 5 MHz spilt? ? I need at least 80db of notch (isolation) Supposedly, it's a Moto. I'm shopping for one. -- - Regards, Karl Shoemaker To contact me, please visit

This is a "For What its Worth" post, but maybe it will have some interest. I hope posting this here does not violate any group rules, but it seems like the appropriate audience. I am clearing out

I've used TDR to find fault on small JKT(telephone wire) to underground tech cable (10-3) The velocity can be anywhere between 50 to 90 % Make sure there is no remaining power connected to any of the

Steve, I have RSP Spectrum Analyzer made for the RSP line of inexpensive SDR receivers and while it works well and is cute, its just a toy. Alignment of repeaters which I take as tuning the receiver

Not for high voltage, but for fire alarm cabling on utility poles. I had a Riser Bond TDR that I used for fault location.? A long time ago I was asked to find a fault in a municipal cable that was