- 1. [Amps] Russian pre-tuning units (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Sat, 27 Aug 2011 13:35:27 +0200
- Hi to the group, This is my first post so a little about myself first, I'm an electrical engineer who plays with very big drives(1 ~11MW size) I live in South Africa and have the call ZS6BXI which I
- /archives//html/Amps/2011-08/msg00204.html (7,628 bytes)
- 2. [Amps] Testing swinging chokes (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Sat, 10 Mar 2012 09:13:16 +0200
- Hi to the group, There is only one "good" way of testing a "swinging" choke. It needs a reasonable two channel digital storage scope. A bank of electrolytic caps and DC power supply for "say" 20 volt
- /archives//html/Amps/2012-03/msg00103.html (7,408 bytes)
- 3. [Amps] more on testing DC chokes by demand (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Sun, 11 Mar 2012 10:54:27 +0200
- For Marty more on Choke testing First there isn't really a circuit..I usually use whatever is to hand at the time ! The idea is to connect the choke across a DC supply and measure the current through
- /archives//html/Amps/2012-03/msg00150.html (11,057 bytes)
- 4. [Amps] Reply to Marty (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Sun, 18 Mar 2012 18:47:54 +0200
- Hi Marty I get my emails bounced from your Email address so...here is the reply I tried to get to you on swinging chokes. Hi Marty glad you liked my first reply. Swinging chokes are normally rated on
- /archives//html/Amps/2012-03/msg00205.html (7,327 bytes)
- 5. [Amps] QSK on the cheap (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Sat, 6 Oct 2012 18:05:08 +0200
- Hi to the gang. I have been reading the mail about doing QSK by switching the screen voltage with interest. I have a home brew 1200 Watt GU43 based amp which has had a hard life.before it got to me.
- /archives//html/Amps/2012-10/msg00036.html (8,405 bytes)
- 6. [Amps] Valve book phillips (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Mon, 26 Nov 2012 18:58:50 +0200
- Hi to the group, I'm not sure if it is any use to anyone but..I have a Phillips data book on transmitting tubes for communication, section Tetrodes and pentodes and associated accessories. It contain
- /archives//html/Amps/2012-11/msg00172.html (6,715 bytes)
- 7. [Amps] Resonant chokes (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Sat, 22 Dec 2012 19:44:57 +0200
- Hi guys, I went through the measurement of DC chokes awhile back on this forum. Any measurements you make with AC doesn't mean much unless there is some DC involved. There is only one practical metho
- /archives//html/Amps/2012-12/msg00137.html (7,398 bytes)
- 8. [Amps] Resonant choke measurment (score: 1)
- Author: "Bob" <bobt@iafrica.com>
- Date: Sun, 23 Dec 2012 15:09:14 +0200
- Hi Peter I tracked down what I said originally see below:- First there isn't really a circuit..I usually use whatever is to hand at the time ! The idea is to connect the choke across a DC supply and
- /archives//html/Amps/2012-12/msg00153.html (13,285 bytes)
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