1. 2% silver is not going to lower electric resistance much at all. The combo mentioned in the thread will be a eutectic or close to it, and melt a few degrees below -- no more -- than the 63tin/37le
In a recent exchange between K2VCO and KM1H, they describe what sounds like to me a good way to test out an unknown transformer's power rating. I have seen hand-held stand-off, IR responding thermome
Some discussants in this have mentioned buying old solder at hamfests, etc. I do the same, but it is important to read labels carefully. The solder that has the lowest melting point is (by weight) 63
Tnx 4 ur response. I was/am unaware of this international standard. And it was a long time ago that I got stung on the solder, so I hope that the problem (or con) won't recur. I recall that the label
Some of you will remember that I was wondering about utilizing a small Philco power transformer (model 45-7011-7) for a screen supply. It puts out 380-0-380 vac plus 5 and 6 v for filaments. I have
REPLY TO THE REPLY: Yes, it is true that: "it is a current regulator, not a voltage regulator". That would be why it should be shunt regulated in this application, with total current through the acti
I've had experience similar to that described below with their products, of which I have a number, some active, some passive. I've learned the following: (a) don't believe their CCS and max ratings;
Agree strongly. I had considerable email exchanges with Reid just a few months ago, and he was most helpful, clear and detailed. I had never had any exchanges with him prior to this; I gathered that
In some earlier postings, someone pointed out the lack of cleanliness and apparent linearity in the output of many of the solid state transceivers on the market. This person, IMHO accurately, also po
Vic K2VCO and all, You are correct that the technique to be used in the USA -- two VA130 MOVs each connected from one of the hot wires to ground -- wouldn't work with no ground. I have used the follo
Manfred You provided an enlightening and useful comment; thank you. I was unaware of this problem with electrolytics in "switchers", but most of my experience has been with elctrolytics used to filte
Reference discussion concerning "SCR to adjust 240v to 200v": There is a good application note available on the Littelfuse website concerning phase control; google: littelfuse phase control ; should
All, Concur with Bill W6WRT re "positive vs negative" convention in describing current. The convention we use now is left over from at least a hundred years ago when a scientist guessed wrong about t