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1. [Amps] crossmodulation in PA ? (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Wed, 5 Sep 2007 14:41:14 +0200
Hi everybody ! At our small contest station LN8W / LA8W we have a strange problem.. It appears that we have crossmodulation taking place in the power amplifier. When running 1 KW to a 20m yagi at 90
/archives//html/Amps/2007-09/msg00023.html (8,191 bytes)

2. Re: [Amps] crossmodulation in PA ? Thanks for all good advice (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Wed, 5 Sep 2007 20:55:32 +0200
Hello everybody ! I have been reading all replies and thank everybody for all advice so far. I agree that crossmodulation in power meter diodes is highly unlikely due to the reasons explained to me.
/archives//html/Amps/2007-09/msg00032.html (11,316 bytes)

3. Re: [Amps] 7.5V Zener 10W for TL922 (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Fri, 7 Sep 2007 11:36:15 +0200
Hi Aron. Maybe this one will fit ? 73's Peter http://www.mouser.com/search/ProductDetail.aspx?R=1N2971Bvirtualkey62850000virtualkey898-1N2971B _______________________________________________ Amps mai
/archives//html/Amps/2007-09/msg00070.html (6,639 bytes)

4. Re: [Amps] regulated screen supply (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Mon, 10 Sep 2007 15:49:23 +0200
Hi ! You got some serious power there :-) I do not think it is recommended to run that tube at full ratings at 144 Mhz. Tube parts will overheat ! I have never seen it used higher than VHF TV ch 2 ar
/archives//html/Amps/2007-09/msg00109.html (8,504 bytes)

5. Re: [Amps] load pulling (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Wed, 12 Sep 2007 17:51:55 +0200
Could it be part of a ionosonde transmitter ?? Just a wild guess, as I have no idea of pulse rates on those things... Nils "Peter" _______________________________________________ Amps mailing list A
/archives//html/Amps/2007-09/msg00127.html (7,442 bytes)

6. [Amps] Clean carrier-hum on harmonic (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Sun, 16 Sep 2007 18:27:27 +0200
Using an Acom 2000A.connected to a 20m Yagi, When listening on the carrier on a portable receiver, attenuator on, short whip antenna, it sounds nice an clean. 2. harmonic on 10m has a lot of hum-modu
/archives//html/Amps/2007-09/msg00167.html (6,720 bytes)

7. Re: [Amps] 6 mtrs: (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 25 Sep 2007 15:49:19 +0200
Hi all ! I have so far not contributed to this discussion, but as a long time ham (1968) as well as a professional, I would like to say a few words: I think it is possible to make a pair of 572B's wo
/archives//html/Amps/2007-09/msg00262.html (9,759 bytes)

8. Re: [Amps] 6 mtrs: (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 25 Sep 2007 16:22:54 +0200
No, I do not think the results would be the same at 3.5 as on 50 Mhz. Those curves are traced below 30Mhz and if you try to make a set of curves for 50Mhz they would be very different ! Those curves
/archives//html/Amps/2007-09/msg00265.html (9,349 bytes)

9. Re: [Amps] 6 mtrs: (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 25 Sep 2007 17:03:19 +0200
Well Lou You are missing the fact that those curves will actually change with changing frequency ! The determining element here is the tube itself, and not the curves. The curves are graphical expres
/archives//html/Amps/2007-09/msg00268.html (9,401 bytes)

10. Re: [Amps] 6 mtrs: (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 25 Sep 2007 18:14:50 +0200
I can not argue against that as I have never had the chance to test one of your conversions. .... Also, my points in the mailings are of a general nature, and not spesifically pointing to your const
/archives//html/Amps/2007-09/msg00282.html (13,831 bytes)

11. Re: [Amps] IMD (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Wed, 26 Sep 2007 20:00:52 +0200
Hi friends ! I feel a little sorry that I ever contributed to this thread (some time ago...) Let us read "the radio amateurs code" (ARRL) It says something about friendship in our ham-community. We c
/archives//html/Amps/2007-09/msg00339.html (7,747 bytes)

12. Re: [Amps] IMD (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Thu, 27 Sep 2007 02:16:26 +0200
Ok I admit I have a juvenile or female trait in my life.... nevertheless I am dropping this thread. But I am doing so crying out loud that you will never get 750 watts from a pair of 572B's with reas
/archives//html/Amps/2007-09/msg00347.html (10,189 bytes)

13. Re: [Amps] Amps Digest, Vol 57, Issue 52 (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Thu, 27 Sep 2007 03:54:09 +0200
Yes Ed Somebody still cares.... I am an old ham (1968) Those were the days were the laws of nature still ruled. And I still have a few nice instruments from those days, --for some reason they still g
/archives//html/Amps/2007-09/msg00351.html (37,418 bytes)

14. Re: [Amps] PT2500A (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Mon, 15 Oct 2007 23:30:04 +0200
http://www.eham.net/reviews/detail/79 _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-10/msg00195.html (10,107 bytes)

15. Re: [Amps] Interesting Merger in the Works? (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 6 Nov 2007 00:36:22 +0100
Yaesumoto of course ! -- Original Message -- From: "Gary Smith" <wa6fgi@sbcglobal.net> To: <k2xx@swva.net>; <towertalk@contesting.com>; <amps@contesting.com>; <FTdx-9000@yahoogroups.com> Sent: Monday
/archives//html/Amps/2007-11/msg00061.html (7,817 bytes)

16. Re: [Amps] Interesting Merger in the Works? (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 6 Nov 2007 00:52:28 +0100
"Vertex Standard's strength in the Amateur, Marine and Airband (Avionics) segments will also provide Motorola with access to new business opportunities" Apparently uou will have to wait some time fo
/archives//html/Amps/2007-11/msg00063.html (8,405 bytes)

17. Re: [Amps] 50 Ohm Loads (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 13 Nov 2007 19:55:06 +0100
Hi ! The MP9xxx series resistors from Caddock are excellent, and they have very low series L . A 50ohm/100Watt unit is typically 20nH (nanoHenry). The problem with the TO-packaged units is that they
/archives//html/Amps/2007-11/msg00191.html (11,076 bytes)

18. Re: [Amps] Caddock power resistors (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Tue, 13 Nov 2007 20:44:53 +0100
Tnx for info George ! They can be useful in a number of RF power applications then ! I was worried about stray capacitance forming a RC network all through the resistor. This info is useful for me TN
/archives//html/Amps/2007-11/msg00193.html (9,761 bytes)

19. Re: [Amps] Bird 1KW+ Load Resistor/possible danger ! (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Sat, 17 Nov 2007 17:45:26 +0100
POSSIBLE DANGER ! Coolants like the one you describe very frequently contained high amounts of PCB ! This is a hazardous group of chemicals that is now to be treated as very dangerous waste! It can a
/archives//html/Amps/2007-11/msg00227.html (10,455 bytes)

20. Re: [Amps] Bird 1KW+ Load Resistor/possible danger ! (score: 1)
Author: "Nils Petter Pedersen" <la7sl@online.no>
Date: Sat, 17 Nov 2007 21:03:14 +0100
Hi Carl ! Global warming may not affect you seriously in your lifetime...but it could affect your grandchildren.. that does not concern you ? But to stay on topic: It is true that PCB is not an acute
/archives//html/Amps/2007-11/msg00231.html (10,440 bytes)

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