Hi Bill, Yes, the delay between the Carrier and the Modulation has to be equalized somewhere... The original Kahn scheme implemented it at a fixed frequency with an LC delay. In the 21st century, one
Hi Manfred, <snip> I have a PDF somewhere that addresses this problem. I'll dig it out and send it to you I once looked at doing it that way too -- gets a mite ugly. I'm currently building a test bed
Hi Jim, I'd suggest using mil type RLR or if you realllly want long term reliabilty use type RNC. Either one will last near forever. No comparison to carbon comp or even film. 73 & Good morning, Marv
The sad story may be seen here: http://www.solarcycle24.com/ 73 & Good morning, Marv WC6W http://wc6w.50webs.com/ * _______________________________________________ Amps mailing list Amps@contesting.c
Hi Dick, Here's a circuit I designed to sense PEP with Bird 43. It may be adaptable to other units. http://wc6w.50webs.com/wc6waccy/index.html?fr40.html 73 & Good morning, Marv WC6W http://wc6w.50web
Hi Jim, For the load side you might also consider some of the modern ceramic parts made by ATC, Temex or Murata. The lower value parts are rated up to around 3KV and their current capabilties are imp
The other day, just for fun, I swept a bunch of ol' RF chokes -- solenoid wound, pie wound, etc. All of them exhibited nasty resonances somewhere within the HF spectrum. I then wound a few experiment
Hi Hardy, True... but, the DC will "kill" the core at HF. Look at the bottom of page 129 on this link http://fair-rite.com/newfair/pdf/CUP%20Paper.pdf to see the ... damage. And operating on the curv
Hi Angel, The point was to make a rather high value (1-2mHy) choke with no resonances in the HF region. The saturation gotcha was a by-product. A rod wouldn't suffice in this application. A gapped co
No one appears to have addressed my original query re: servo cancelling the DC in a toroid core. Rather wandering back to the general plate choke topic... So, I'll wander a bit too! While experimenti
Hi Jim, That is actually old knowledge. See the bottom of this page on my site: http://wc6w.50webs.com/wc6wamps/index.html?fr62.html And it can't produce a mHy range coil sans resonances. 73 & Good m
Hi Larry, So that the choke still behaves as a choke down on 160 rather than becoming a significant portion of the plate circuit. 73 & Good morning, Marv WC6W http://wc6w.50webs.com/ ________________
Hi Gary, A second winding in series that cancels the DC would also cancel the AC rendering the part... useless. A second winding with only DC is indicated, and with minimal coupling to the main windi
Hi Jim, To my knowledge, rods are not made (as standard parts) in 43... a few cable cores could be stacked. Rod cores don't have anywhere near the effective mu of a toroid. Because of the open magnet
Hi Carl, ... "looks like" is right! I'd wonder what material is employed in those contacts. It sure isn't silver plated brass like the genuine article. 73 & Good morning, Marv WC6W http://wc6w.50webs
1N2804A -- 6.8V 50 Watt Zener Diodes, TO-3 case, NOS -- $10 each More Semiconductors may be seen at: http://wc6w.50webs.com/wc6wfsw/index.html?fr20.html ** Transformers ** Powerstat 10B 120 volt, 1.7
Hi Lee, Price is in the wallet of the beholder ... Obviously that thingy has developed some collectors value. Aa an example of how totally silly e-pay-world can be, I refer you to the critter on this
Hi Bill, That's a RFK series relay. Definitely NOT a reed relay. A modification of the ol' half size crystal can units. The contacts will survive low current switching at bias voltages. However... th
Hi Rex, The voltage will be rather high on the open upper band relays if you are running on the lowest frequency. 73 & Good morning, Marv WC6W http://wc6w.50webs.com/ <snip> <snip> __________________
Hi Carl, Not all that hard if one happens to recall the name of the manufacturer! :-) http://www.polyflon.com/caps.htm 73 & Good morning, Marv WC6W http://wc6w.50webs.com/ <snip> ____________________