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1. Re: [Amps] plate choke (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Thu, 25 Aug 2005 21:15:40 +0200
Hi , guys. A quick look in the Will Orr's radio bible shows that in a 160 meters amplifier the RF choke is about millihenry! (23rd edition, page 17-5). This is the reason commercial amplifiers use ch
/archives//html/Amps/2005-08/msg00677.html (9,457 bytes)

2. Re: [Amps] plate choke (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Thu, 25 Aug 2005 21:21:53 +0200
Soory everyone! I should have stated that the choke in Will Orr's book had a value of 4 (four) millihenry! Alex 4Z5KS _______________________________________________ Amps mailing list Amps@contesting
/archives//html/Amps/2005-08/msg00678.html (8,359 bytes)

3. Re: [Amps] plate choke (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Fri, 26 Aug 2005 09:48:43 +0200
The main problem stems from the 160 meters operation! For the higher bands, chokes are usually in the range of 68 to 100 microhenries. These are easily wound in a solenoid manner and if you space win
/archives//html/Amps/2005-08/msg00688.html (9,240 bytes)

4. Re: [Amps] Plate Choke (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Fri, 26 Aug 2005 09:55:13 +0200
...like I said, there's always the solution of changing over to a parallel tuned plate circuit with link coupling: a little more work in setting it up initially but much less of a headache in the lon
/archives//html/Amps/2005-08/msg00689.html (8,109 bytes)

5. Re: [Amps] Energy stored in capacitor bank ? (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Tue, 4 Oct 2005 13:14:53 +0200
...the question is not ripple. A high capacitance here will improve the dynamic range of the current capability of the supply, what we nickname the stiffness (stable voltage on current peaks) But the
/archives//html/Amps/2005-10/msg00106.html (8,284 bytes)

6. Re: [Amps] Drake L4 with 3-400Z photos (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Fri, 14 Oct 2005 18:45:58 +0200
..it's not just that: most cordless phones have very good filters on the RF input, notwithstanding the fact that they operate on a frequency 30 times higher than our HF bands. Besides, they are requi
/archives//html/Amps/2005-10/msg00382.html (8,737 bytes)

7. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Sat, 15 Oct 2005 13:40:35 +0200
Hi guys: So much talk on the grounds that I feel compelled to add something. Years ago-quite a few by now- we've been taught to place a copper strip along the operating table and connect it to both e
/archives//html/Amps/2005-10/msg00399.html (9,520 bytes)

8. Re: [Amps] AC wiring (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Sat, 15 Oct 2005 13:50:54 +0200
...guys, losses are ALWAYS quadrupled! Losses follow the V^2/R law or, more appropriate I^2*R law. And current is average current, not peak current! Since at half the voltage the current doubles, dro
/archives//html/Amps/2005-10/msg00400.html (7,708 bytes)

9. Re: [Amps] Better electrical safety? (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Sat, 19 Nov 2005 20:24:32 +0200
...guys, it doesn't have much to do with frequency! The human body doesn't have too much inductance so the problem with current through the body still exists. THIS is what creates burns, RF or otherw
/archives//html/Amps/2005-11/msg00350.html (7,796 bytes)

10. Re: [Amps] difference between 2,3,4 and 43, 45, ... materials? (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Sun, 27 Nov 2005 23:54:27 +0200
Another source is Bytemark. Not the cheapest but good service and willing to cater to hams. Alex 4Z5KS _______________________________________________ Amps mailing list Amps@contesting.com http://lis
/archives//html/Amps/2005-11/msg00498.html (7,535 bytes)

11. Re: [Amps] help diagnosing a bad 8450a probe ? (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Fri, 9 Dec 2005 19:49:22 +0200
....that's true! For the most part, Shottky diodes are much more uniform that the silicon junction type. If you want to look for some RF relevant fearture, check for the forward voltage drop in a reg
/archives//html/Amps/2005-12/msg00107.html (8,215 bytes)

12. Re: [Amps] NEC-think. (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Fri, 6 Jan 2006 08:09:00 +0200
...yes even then! What happens is that the trip switch has both the neutral wire AND the live one passing through. What keeps it from tripping is the fact that both the neutral and the live wires cur
/archives//html/Amps/2006-01/msg00201.html (8,622 bytes)

13. Re: [Amps] Is solid Cu 600VAC house wire, good for tank toroids? (score: 1)
Author: "Alex Eban" <alexeban@bezeqint.net>
Date: Fri, 6 Jan 2006 08:15:45 +0200
....or put a little differently: " we are too poor to afford cheap things". No, seriously, the E_H antenna is using PVC insulated house wire in its matching networks at the kilowatt level without any
/archives//html/Amps/2006-01/msg00202.html (8,490 bytes)

14. Re: [Amps] Parasitic Suppressor 4-1000A (score: 1)
Author: "Saandy" <alexeban@bezeqint.net>
Date: Fri, 10 Mar 2006 11:35:23 +0200
....yeah! Now, you have arching, like you wanted (HI). It probably needs more inductance in the suppressor. According to W6SAI (blessed his memory), the 4-1000 needs 4 turns, 16 gage, &frac12; inch d
/archives//html/Amps/2006-03/msg00237.html (8,844 bytes)

15. Re: [Amps] Parasitic Suppressor 4-1000A (score: 1)
Author: "Saandy" <alexeban@bezeqint.net>
Date: Fri, 10 Mar 2006 21:09:45 +0200
?.i?ll try to explain. First of all, it?s perfectly true that each and every amplifier has its own peculiarities and its own particular solution. What I tried to stress is the fact that this tube nee
/archives//html/Amps/2006-03/msg00249.html (11,581 bytes)

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