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The little caps I am talking about here are for a tiny 200watt sweep tube amp. It was sold as a 6m/10m amp but I can only imagine how not deficient it is on 6m....LOL I am working on fixing that. It will be true HF all band all mode when I am done with it. The little caps for it have to fit on...

Ok I am looking for a 450V Electrolytic Cap with not less the 30uF capacitance to replace some 30++++ year old Cornell Dublier paper caps in a rectifier board that are blistering even though they are still amazingly testing out as good. Only a matter of time before they give way. My problem is...

Yes I know the combo of resistor,cap and diode but I had seen a bunch of recent home brew projects with just the classic orange dick caps across the diodes in the diode string on rectifier board. Instead of resistors one each part I am guessing the resistor string between the diode and the...

It looks fantastic!!! Today it does not have SSB. I saw that it has Talkback so looks like Uniden has sold out and has not integrity at all. I am going to guess it has been filling the pinch from some of the export radio's being used on 11m??? Now if Uniden could build a 10/11/12+6m radio...

Well I said "GS 35 I think?" meaning I amnot sure if that is the tube number I am looking for....THeir is one that needs some insane amperage like 20amps+++.........I am really not feeling like digging through Russian tube spec.'s to find the right one.....I have two twins vomiting and running...

First most of the home brew rectifier boards have small 3kv Orange Ceramic Disc caps across each diode I assume as a form of surge protection. I have been looking at OEM rectifier boards and most of them skip the caps across each diode. Now keeping in mind that I will not use this as my sole...

Also think of the coax you will need what Heliax LDF 7-50 and that is if you stick to HF bands and that something like 1 5/8 inch diameter. If you go outside HF into UHF/VHF you will need something even bigger. Connectors and everything gets big and expensive in a hurry. I knew a guy that had a...

Number one do you have three phase power at your home? I think it listed 240/380 three phase power needed. Then you have the fact that it is well beyond the legal limit which means it is recipe for abuse. If you have the power you will use the power does not matter if it is a car an amplifier or...

One problem is that their will likely be no data on how the tube responds and it's limits. Most tubes have a range where they are fine sound wise and some freq. ranges where they distort badly. Since almost no one has used RF tubes in this way outside of Russian Surplus and such their are a lot...

Prob. a problem of a parasitic. If some one over drove it I would wounder why and how. If anything they prob. did not tune it up well. Not a lot of armature radios that go above 100 watts output that where commonly used with this amp from it's time frame. It has only been what the last 10 years...

Wow I have never actually seen on like this. I have read about them mostly in Europe where they have 220+. Usually someone on an insanely low budget using nothing but scrap or recycled parts. They did not even use spring clip for the anode connector they soldered the wire right to the cap. I...

I think this demonstrates just how robust they can be especially with low voltage high amperage. The fun part is near the end when you see what he doing with them. Kind of makes 30 seconds to 2 minute key down seem like kids stuff from an abuse and durability perspective. This is just proves...

I was at a gas station meeting up with a bunch of guys from High School. When I would key up the florescent bulbs of the closed gas station would light up when I keyed. Their must have been 8-9 bays with 4 long florescent bulbs in each one. They would come on when I keyed up then a few seconds...

Update on MOT's looking for a cheap supply of these in like new or new I have found Ebay not a bad place to start. I found one guy that sells new MOT's that are taken from units damaged in shipping. So for instance he had 4 identical MOT's @ $11 each but $17 to ship each one. Now those are...

Just a fun factoid about copper. THeir are roofs made out of copper in Europe that are 1000 years old and still working great. Once copper get's that green patina the process stops and the copper underneath is now sealed up tight from the environment. Unlike the oxidation of iron type materials...

I second the saftey of keeping it high enough so kids and stupid people do not try and touch it. From about 500watts on up you can get some burnt tissue from RF energy. I once had someone not believe me so I keyed my then 667 and they touched my 102 inch whip. It left a burn mark on their hand...

The paper used was not in the best shape and this battery charger is at least 50 years old. I thought that since this things sits outside in my pole barn and is often outside in the winter that it might be wise to stop it from decaying any more. So I baked it at 180° to get any residual moisture...

Ok so I have an old 6/12 2,5,10 amp batter charger. I took it apart cleaned the Transformer with iso/alcohol then backed it the over at 180 degree's F. Then I mixed up some resin and poured into the transformer. I replaced some of the diodes and cap's since I intend to return it to being a...

Fine Rain on my parade......LOL Transistor amps are easier to build and so much more friendly to wide bandwidth coverage.....LOL I talked with someone that I would love to meet someday he a well established home brew Amateur. He suggested that if I had a Q of 4 or higher on each individual...

Having spent my senior year and one year out of H.S. work in an Electronics repair facility that was broadcast and Ham heavy with customer's I learned early on from my then Mentor not to do the Gear/Equipment Safari if you could help it. Back then I had no wife well I do not have one of those...