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1. [AMPS] Have Cake & Eat it too (score: 1): Author: jonk@jskent.com (Jonathan Kaplan); Date: Thu, 09 Sep 1999 06:51:37 -0700; Hi All, I've been slowly putting on line my tower installation with a TH7DX and a M2 40 mtr dipole atop a 55ft crankup. I've noticed a strange behavior since switching from a tuned dipole. My Clipper; /archives//html/Amps/1999-09/msg00042.html (8,416 bytes)
2. [AMPS] Have Cake & Eat it too (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 09 Sep 1999 07:19:54 -0700; If you mean that the meter shows extra high power on frequencies for which the SWR is high, this is an inaccurate power reading caused by the meter's being designed to work properly only on a relativ; /archives//html/Amps/1999-09/msg00043.html (8,868 bytes)
3. [AMPS] Have Cake & Eat it too (score: 1): Author: RFpower@radiodan.com (Radiodan W7RF); Date: Thu, 9 Sep 1999 08:30:25 -0700; Hi Jonathan, Wattmeters are most accurate at their designed input and output impedance (50 ohms for our communications stuff). Even a BIRD is not accurate for forward power when a high SWR is present; /archives//html/Amps/1999-09/msg00044.html (11,101 bytes)
4. [AMPS] Have Cake & Eat it too (score: 1): Author: jonk@jskent.com (Jonathan Kaplan); Date: Thu, 09 Sep 1999 08:32:21 -0700; The M2 sits about 5 ft above the TH7DX on the towers mast. Also the M2 is rotated 90 deg from the TH7DX, so I would think they are not coupled. Do you know diffferent? Thanks for the quick reply. Jon; /archives//html/Amps/1999-09/msg00045.html (9,575 bytes)
5. [AMPS] Have Cake & Eat it too (score: 1): Author: jonk@jskent.com (Jonathan Kaplan); Date: Thu, 09 Sep 1999 08:37:45 -0700; the Not EXTRA high power. The maximum power showing in any case is about 1Kw, which I am told is about expected for 100w drive from a Yeasu Ft-840. amp is the amp system If the amp has harmonics, bei; /archives//html/Amps/1999-09/msg00046.html (9,633 bytes)
6. [AMPS] Have Cake & Eat it too (score: 1): Author: mgilmer@gnlp.com (Gilmer, Mike); Date: Thu, 9 Sep 1999 11:43:30 -0400; I have no experience with either antenna and certainly not with the two arranged as yours are. This is probably a topic for TowerTalk. Go to eHam.net and use the eHam Detective to search the reflecto; /archives//html/Amps/1999-09/msg00047.html (10,274 bytes)
7. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 9 Sep 99 11:40:30 -0500; Someone suggested this belongs on Tower Talk - NOT! It's an amplifier related question. If you have a high SWR, your power meter WILL very likely read higher power than would be read under a "normal"; /archives//html/Amps/1999-09/msg00048.html (10,706 bytes)
8. [AMPS] Have Cake & Eat it too (score: 1): Author: mgilmer@gnlp.com (Gilmer, Mike); Date: Thu, 9 Sep 1999 12:50:19 -0400; My comment was specifically directed towards the issue that this person may have an interaction problem. Please read my post again if you doubt it. As such I am correct to suggest TowerTalk. As to th; /archives//html/Amps/1999-09/msg00049.html (11,523 bytes)
9. [AMPS] Have Cake & Eat it too (score: 1): Author: jonk@jskent.com (Jonathan Kaplan); Date: Thu, 09 Sep 1999 11:36:04 -0700; In this case, I'm getting readings of around 100w, which is barely more than the Ft-840 is putting out by itself. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.co; /archives//html/Amps/1999-09/msg00050.html (9,199 bytes)
10. [AMPS] Have Cake & Eat it too (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 09 Sep 1999 12:38:07 -0700; Perhaps the amp is being overdriven or is mistuned. I still don't understand whether the problem is that the SWR on a given band goes up as the power output goes up, or if the power that the meter sh; /archives//html/Amps/1999-09/msg00052.html (8,783 bytes)
11. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 9 Sep 99 15:58:35 -0500; OK, Let's try to make some sense to this: 1.) Do you have a dummy load? If so, try running the amp on the affected band into the dummy load. Does all work fine then? 2.) What SWR do you get on your a; /archives//html/Amps/1999-09/msg00054.html (11,618 bytes)
12. [AMPS] Have Cake & Eat it too (score: 1): Author: jonk@jskent.com (Jonathan Kaplan); Date: Thu, 09 Sep 1999 16:10:31 -0700; Barefoot most of the SWRs are good, 1.5-2.0:1. The exceptions are 3.0:1 in the high end 15mtr band (ca. 21.800mhz) and 5-8:1 in the 40 mtr band. No, this is occurring on all the bands. Well, now you'; /archives//html/Amps/1999-09/msg00056.html (11,714 bytes)
13. [AMPS] Have Cake & Eat it too (score: 1): Author: realex@flash.net (bob alexander); Date: Thu, 09 Sep 1999 19:43:06 -0500; Jonathan, Either throw the RS WAttmeter in the trash or replace all the diodes in it. 73, Bob, W5AH -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrati; /archives//html/Amps/1999-09/msg00061.html (9,093 bytes)
14. [AMPS] Have Cake & Eat it too (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 09 Sep 1999 18:56:25 -0700; Absolutely! With a perfect swr meter one would expect the SWR reading to remain the same as you increase power from 1 watt to 1 megawatt (at least until the coax starts to melt). 73, Vic, K2VCO Fresn; /archives//html/Amps/1999-09/msg00063.html (9,462 bytes)
15. [AMPS] Have Cake & Eat it too (score: 1): Author: jonk@jskent.com (Jonathan Kaplan); Date: Thu, 09 Sep 1999 20:07:45 -0700; remain But that's not what's been happening. The SWR rises with the AMP Power, but remains the same (and well behaved) whenI run barefoot. Go figure! Jonathan -- FAQ on WWW: http://www.contesting.com; /archives//html/Amps/1999-09/msg00064.html (9,664 bytes)
16. [AMPS] Have Cake & Eat it too (score: 1): Author: wd4jra@planttel.net (John Vickers); Date: Thu, 09 Sep 1999 23:35:04 -0400; Check your coax jumpers, connections, etc. Sounds like a breakdown when powers raised-- Gud Luck WA4TT -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administ; /archives//html/Amps/1999-09/msg00067.html (9,023 bytes)
17. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 10 Sep 1999 00:33:01 -0500; The SWR should remain the same no matter what you do to the tuning of the amp. If the SWR changes with power, then you do have a problem with the coax. What kind of coax are you using? I hope RG-8 or; /archives//html/Amps/1999-09/msg00068.html (9,766 bytes)
18. [AMPS] Have Cake & Eat it too (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 10 Sep 1999 00:35:54 -0500; Yes. Adjusting the load control on the amp effectively tunes the tank of the amp to somewhat match the impedance seen on the transmission line. However, in terms of an SWR meter and a 50 Ohm system,; /archives//html/Amps/1999-09/msg00069.html (9,346 bytes)
19. [AMPS] Have Cake & Eat it too (score: 1): Author: mgilmer@gnlp.com (Gilmer, Mike); Date: Fri, 10 Sep 1999 08:11:24 -0400; Wow. This is a very different scenario than what I first pictured/assumed (I know, I know) you were talking about. You seem to have several problems with your system and you need to isolate them or y; /archives//html/Amps/1999-09/msg00071.html (10,523 bytes)
20. [AMPS] Have Cake & Eat it too (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 10 Sep 1999 08:15:28 -0500; What type of coax are you using? -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@conte; /archives//html/Amps/1999-09/msg00072.html (9,680 bytes)

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