Hello all, Anyone out here have any experience with k2aw (silicon alley) HV rectifiers? I'm looking to replace the individual devices in my LK-800 and am concerned with the ratings. K2AW claims that
I have used his devices for years...excellent performance/service. Use silicon grease and mount on a good conductive surface. In a full-wave bridge circuit drawing a 2 amp load, each side of the brid
In FWB configuration, 1N5408s will reliably deliver up to 6A of average-I if they are mounted on a perfboard in open air. No heatsink required. Why replace such with lighter-rated rectifiers and a b
I have to agree with Rich; the stock 1N5408's are fine for that amp. I have worked on many LK-800A and -TNY versions with never a diode problem. One thing to remember is that the 1N5408 is an industr
I agree with Carl. All these rectifier "blocks" are is a string of regular diodes inside an epoxy case. Why bother replacing a very heavy duty diode string with a string of much smaller diodes in a
Verily, Tom. However, for those with more cash than common sense, ripping out $4 worth of husky rectifiers and replacing them with $60 worth of lesser rectifiers does help to reduce the cash surplus
Well if you add in the cost of buying the equalizing the resistors, the capacitors to go across them, taking the time to build all that stuff up on a board, I still think the blocks are the best val
Author: w9ja@contesting.com (W9JA Paul Hellenberg)
Date: Tue, 27 May 1997 18:24:21 -0500
They are all I every use . Apporching 20 PS now built over the years. 0 Failures. 73 Paul W9JA/4 706 745 5696 W9JA@contesting.com or paulh@truline.com Paul J Hellenberg Tru Line Lithograhing Inc. 414
The need of equalizing resistors and spike caps due to diode manufacturing variations pasted almost two decades ago. Old habits are slow to die. There is various types of the diode stacks, and in ind
Those who do so are living decades in the past, flushing their money down the toilet, and decreasing the reliability of their rectifier unit. The epoxy-potted diode stack manufacturers stopped using
And only hams and CBers use them. The commercial, amateur and industrial company engineers are a bit smarter. It doesnt take a rocket scientist to look up the specs and realize those $ .25 1N5408's a
Hi Pat, Interesting. What manufacturing process suddenly changed or improved?? I've heard that mentioned several places, does anyone know the source of that information? 73, Tom W8JI -- FAQ on WWW: h
For my monthly magazine column, I checked that information with Ken Stewart, W3VVN, who wrote the Power Supplies chapter for the current ARRL Handbooks. Ken is a power supply designer for Grumman, an
Hello Tom, Wow~! What a can my comment opened on this one. I'm glad to see as it helps us all learn, at least I have. I stated writing a reply to the whys and hows when another email arrived from Ian
....snip... IMO, adding more words is not always better, Ian--unless one is getting paid by the word! Adding to Ken Stewart's well-worded statement on page 11.9 in the ARRL Handbook hardly seems lik
There is a typo in my previous post. RE: "......hardly seems like gilding a lily".--remove the word 'hardly" The paragraph should have read: Rich-- R. L. Measures, 805-386-3734, AG6K -- FAQ on WWW: h
Absolutely great information Ian and thanks for the contribution to the list. I was going to comment but you covered all the bases. My info source BTW is Donald Hornbeck, VP/Eng RAMTEK which is a pre
On Wed, 28 May 1997 11:13:51 -0400 (EDT) Patrick Croft <mai@iquest.net> writes: So very true Pat. One only has to thumb thru "Asian Sources" or "Electronic Components" to locate the manufacturers of
....snip... IMO, Si-diodes of the same type can be wantonly paralleled without concern for forward current-equalization. I would provide a cooling air gap between paralleled diodes. Rich-- R. L. Meas
Well, the extra words were essentially Ken's own, and he was happy to provide them. The key piece of additional information was that older rectifiers broke down in a destructive arc, but modern ones