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Jason, I'm not sure how many db of desense exactly. Just listening to it by ear for the crackling noise to appear. The TinySA ultra in signal generator mode does allow me to generate an audible tone

The return loss dips do not align and add in depths when all the pass cans are tuned to the same frequency and connected together. ?This is more noticeable when tuning 2 or more pass cans in series.

Return loss at equipment port can vary by how the cans are tuned and interacting with cable lengths. You could see 3 dips in the return loss response. Those dips are relating to the pass tuning.

Don't know if I missed it, but did you determine how many DB of desense is there when testing on an antenna? Tracking you hearing it on the speaker when keying up but if your hearing a 1KC tone around

Charles, with all the cavities hooked together it has about 23.5db of return loss per side. I was told anything over 20db is good. Does that sound correct?

Jeremy I haven't used 6db. I have a couple identical 10db ones I've used. As they are the only matching pair I have. I have various singles of 3db, 6db, 30db, 50db ones. I also have a Wiltron VSWR

How is the RL on each set connected together, and to the load or antenna? Charles Adams K3HKZ Industrial Communications Co. Mobile 610-360-0050 Office 610-253-1214 cadams@...

Charles, Could you elaborate on your procedure? I've always adjusted the passes for best RL, but never the notches. I've never used RL as a measurement to adjust a notch cap, and would imagine any

I recorded this a while back. I thought it might be useful when asking for help about things. Over the years I've strayed away from even asking for help online. The world seems to be filling up with

You are correct I didnt bother to mention return losses. They are roughly 26db per cavity.

HI In your very detailed and lengthy procedure I did not see any mention of RL (return loss) measurements. If you have a good NVA you should touch up the three notch caps on each of the TX and then

Wow, you are over thinking things. ?For vhf, 90 dB should be sufficient at 600khz (for most radios) so needing 100dB or more is nice but not really necessary - you just tune it to see noise width in

I'll take a look again later when I mess with it. Some of that appearance of distortion is actually a bit of clear dielectric grease. I noticed that same look on the tee connectors prior to cleaning

Back in the day I was able to convert HT750 to HT1250 and CDM750 to CDM1250 by just replacing the EEPROM chip and then adding the appropriate housing with display and keypad. Learned from another tech

Might just be me or the angle of the camera, to me this connector looks like it has been roughly abused over time. The middle or center ring whatever way you want to call it looks to be smashed and

I often battle insomnia. Tonight at 3AM I decided to look at some photos I took prior to taking the loops out of the duplexer to clean with alcohol, along with the tee connectors. I take photos more

Decibel Product DB-4060-WOC-C for sale. It has not been modified for 144-148 MHz use. Pulled during system upgrade, very nice condition. I don't have the need or the time to modify them for amateur

There must be dozens of electroplating businesses in USA. My brother in Perth WA and other vintage vehicle enthusiasts ship vintage motorbike components over the Atlantic for such work. Well they were

Desense is driving me crazy. Might be a short ride there. ? Warning: This will be long & descriptive. In hopes I cover everything for getting good advice in return. Last year I bought a new Yaesu

I would probably do something like that, but the shedding is bad enough to where it's peeling off in big chunks. I'm certain that moisture and corrosion has made its way between the brass and the