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Total 26 documents matching your query.

21. Re: [Amps] RF parts and parasitics!! (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Wed, 26 Aug 2009 21:15:40 -0700; ORIGINAL MESSAGE: REPLY: I suppose if you drive ONLY the cathode-grid circuit while the tube is floating in mid-air and have no other circuit components connected, you will find a high impedance when; /archives//html/Amps/2009-08/msg00537.html (9,473 bytes)
22. Re: [Amps] RF parts and parasitics!! (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Thu, 27 Aug 2009 13:32:00 +0300; Well, well, what do you know? Maybe we stirred up some guys who can provide more insight on the matter! Alex 4Z5KS I was just checking prices on new 3-500ZG tubes at the RF parts web site. Interestin; /archives//html/Amps/2009-08/msg00538.html (9,545 bytes)
23. Re: [Amps] RF parts and parasitics!! (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Thu, 27 Aug 2009 15:42:33 +0300; It does make a big difference! By convention' all impedances are measured from the electrode to ground The grid impedance is actually very high and mostly capacitive, as long as you don't draw grid c; /archives//html/Amps/2009-08/msg00540.html (10,444 bytes)
24. Re: [Amps] RF parts and parasitics!! (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Thu, 27 Aug 2009 15:42:33 +0300; Gentlemen: Please keep in mind that, by definition, a choke has a reactance at least 10 times of the other relevant impedances in a circuit. If it comes close to them in magnitude it is no longer a c; /archives//html/Amps/2009-08/msg00541.html (15,031 bytes)
25. Re: [Amps] RF parts and parasitics!! (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 27 Aug 2009 10:14:24 -0400; Incorrect. There were others that commented about staying on track and concentrate on GG only. Adding something else into the mix only adds to the confusion of which there is enough already. Start a; /archives//html/Amps/2009-08/msg00542.html (11,311 bytes)
26. Re: [Amps] RF parts and parasitics!! (score: 1): Author: "DF3KV" <df3kv@t-online.de>; Date: Thu, 27 Aug 2009 18:44:57 +0200; Not in mine, no instrument, no resistor, cathode via the choke and heater transformer c.t. grounded 73 Peter Sure' there is bound to be a swamping resistor of a few ohms for current reading purposes; /archives//html/Amps/2009-08/msg00548.html (9,395 bytes)

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