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I have never owned a MN2000, looking at the schematic “S4” appears to be a progressively shorting, while the antenna selection is not… looking at the front panel both appear to have 45 degree

Pat, I *believe* I have one. I will have to look. I will have to dig it out and test it before I sell it. If memory serves, it is in excellent condition…8 of 9. Don’t know what I would ask for it,

Look around on ebay… I found exactly what I needed. On the shorting vs non-shorting, you may be wanting a progressively shorting section.. Sent from Mail for Windows 10 Sent: Friday, April 2, 2021

From the schematic, I see that one section is a 5 position shorting switch. The other is a two section rather common 5 position non-shorting switch. While it is unlikely you will find a wafer that has

Mike, I went through the similar with 1 stent in 2006. Glad you caught it. Prayers your way. Listen to the Doc's and you'll be around a lot longer.Jim - WB6TNF

Nope, I paid top dollar so for that reason I’m returning it for a refund. He was willing to refund me the cost of parts but comparing this to the schematic, I’m learning that what I was looking at

Wow Steve! I bet this is really common... to find this kind of failures on old equipment as you said. Now I won't be surprised again.Never happened to me before with Collins but sure that doesn't mean

Anyone know the dimensions and thread size(s) needed for that ceramic standoff. I have some that look like they might be close and would be happy to pass one along if it will fit. Thanks, Barry -

Man, I hope you got this cheap :-) 73 and good luck, Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from ProtonMail for iOS

Rob, I, too have found cold solder joints on older rigs — as well as point-to-point wiring that wasn’t soldered at all and worked for over 45 years before finally failing! I worked at Digital in

Nice to see my efforts are remembered!? Peter has described the fix precisely (probably better than I could!).? It was a good repair in that it left the tuner with switch contacts that appeared to

Yes, probably a Jewell (a.k.a. Modutech) MS3T series. The pedigree can often be seen printed at the bottom of the scale plate behind the bezel where you don't normally see it. Jewell data sheets are

It copuld have been lightning, but also a severe mismatch or antenna system fault at high power can cause some crazy nasty voltages and currents. 73 -Jim NU0C "Patrick P" <sbus1313@...> wrote:

Not sure....hot switching perhaps? I have to wonder if those contacts are a little under rated given what could go through them, especially in a high SWR situation, even though they are doubled up.?

Looks to me that 1 of two things may have happened. (And have seen both things, just not on a 2000) 1. Moving the switch when high power is applied., or two, trying to tune an antenna that so far out

So what smokes these things anyway? Lightning? Or is it a problem in the design to be resistive at high potentials? I don’t see any soot, which you’d expect from a lightning strike. But it was hot

Maybe Modutec made the meter. 73, Jim VE1RB [email protected]> wrote:

Best wishes to you, Mike, for a solid recovery. 73, George K4GM

Patrick: A while back Paul Kraemer, K0UYA, posted some pics that I believe are posted on this group that shows a repair job he did on that switch using a 5 position, 5 or 6 pole switch from Russia

That looks like a Centralab wafer. You might find a single replacement wafer on eBay or other sources. They're still made by Electroswitch. Thanks, Barry - N4BUQ