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Total 8 documents matching your query.

1. [Amps] Fw: Tank tweaking (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sun, 22 Sep 2002 12:45:19 -0400; I left off some info, target Q is 12. Have also made some progress. =20 I stuck in an additional 1000 pF on the plate blocking cap (from 800 pF = to 1800 pF) & the results are more reasonable. Am now; /archives//html/Amps/2002-09/msg00177.html (9,138 bytes)
2. [Amps] Fw: Tank tweaking (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 22 Sep 2002 12:16:20 -0500; The tune C value is right in line with the calculations (calc'd at 298 pF, actual 285 pF). We need to know what your using for plate load impedance. I expect you are using too much L in the tank. (((; /archives//html/Amps/2002-09/msg00179.html (7,207 bytes)
3. [Amps] Fw: Tank tweaking (score: 1): Author: vk6apk@eon.net.au (Alek Petkovic); Date: Mon, 23 Sep 2002 07:23:57 +0800; I'm no guru's Bill but I was going to suggest a larger value plate blocker. At 1.9MHz, 800pF has a reactance of 105 Ohms. If you were to replace it with 2000pF it would fall to just 42 Ohms. 73, Alek; /archives//html/Amps/2002-09/msg00188.html (10,330 bytes)
4. [Amps] Fw: Tank tweaking (score: 1): Author: n2bc@stny.rr.com (Bill Coleman); Date: Sun, 22 Sep 2002 21:02:02 -0400; Thanks for all the ideas. I've had a few requests for a couple bits of = data... On 160 the target Q is 12, Plate load is 3200 ohms. =20 I have tried changing the plate blocking cap from 800 pF (it w; /archives//html/Amps/2002-09/msg00189.html (9,366 bytes)
5. [Amps] Fw: Tank tweaking (score: 1): Author: garyschafer@attbi.com (Gary Schafer); Date: Sun, 22 Sep 2002 22:00:41 -0400; Hi Bill, Are you sure that your watt meter reads ok on 160 compared to the higher bands? The other possibility is that the coil stock for the 160 coil has too small wire. The lack of skin effect gets; /archives//html/Amps/2002-09/msg00190.html (10,715 bytes)
6. [Amps] Fw: Tank tweaking (score: 1): Author: 2@vc.net (2); Date: Sun, 22 Sep 2002 20:24:31 -0700; ** However, the DC blocker cap dissipates virtually no power. More Xc ohms results in a slightly different setting of the Tune & Load caps, but no change in P out. - R. L. Measures, a.k.a. Rich...,; /archives//html/Amps/2002-09/msg00195.html (11,062 bytes)
7. [Amps] Fw: Tank tweaking (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 22 Sep 2002 23:29:36 -0500; bands? I meant to mention that too..... A 2-30 mhz Bird slug reads several percent low on 1.8 mhz. Your efficiency may be higher than you think! (((73))) Phil, K5PC; /archives//html/Amps/2002-09/msg00198.html (7,293 bytes)
8. [Amps] Fw: Tank tweaking (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Mon, 23 Sep 2002 09:47:33 +0000; HP thermistor power meters (431/435 etc.) dive off by around 25% below 5MHz. Had me scratching my head for a while. Steve; /archives//html/Amps/2002-09/msg00200.html (7,572 bytes)

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