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201. [AMPS] 8877 Source (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 12:34:03 -0500
Excellent price for full output versions. Well over priced. There is another guy selling the same tubes for $85 on various lists, also from the Milwaukee area so you can pretty well bet they all come
/archives//html/Amps/1999-02/msg00213.html (9,669 bytes)

202. [AMPS] Homebrew 3-500 need help (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 14:16:29 -0500
On Sat, 06 Feb 1999 08:38:53 -0500 Scott Gordon <kq8rp@primenet.com> writes: I would suspect that you are having a case of component drift at the higher power level. If it is all bands I would start
/archives//html/Amps/1999-02/msg00214.html (9,740 bytes)

203. [AMPS] Bleeder Resistors (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 14:29:00 -0500
On Sat, 6 Feb 1999 09:45:07 -0800 "Jim Heath" <jimheath@foothill.net> writes: Anything over roughly 100K in a large bleeder is asking for trouble down the road. The smaller wire used to fill up the r
/archives//html/Amps/1999-02/msg00217.html (7,675 bytes)

204. [AMPS] Cantenna Dummy Loads (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 15:07:03 -0500
On Thu, 04 Feb 1999 18:21:47 "Phil T. (VE3OZZ)" <phil@vaxxine.com> writes: Phil, That article did a nice job explaining the dynamics involved with heat transfer and frequency response. Taking it a st
/archives//html/Amps/1999-02/msg00218.html (11,598 bytes)

205. [AMPS] What is this resistor rating? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 15:17:01 -0500
On Sat, 06 Feb 1999 14:30:08 -0500 "Hugo W. Catta" <hugo@banet.net> writes: There are several size formats with Carborundum resistors over the years. Does it have a part # ?? IE: 886 series is 50W, 8
/archives//html/Amps/1999-02/msg00221.html (8,392 bytes)

206. [AMPS] 470uF/450v caps for $2.25 (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 16:07:29 -0500
On Sat, 6 Feb 1999 12:35:49 -0800 "Will K6NDV" <k6ndv@contesting.com> writes: They do meet a standard and work very well at those levels. Maybe you just do not realize there are many standards. Just
/archives//html/Amps/1999-02/msg00223.html (11,466 bytes)

207. [AMPS] 8877 Source (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 16:02:56 -0500
On Sat, 6 Feb 1999 12:38:06 -0800 "Will K6NDV" <k6ndv@contesting.com> writes: Some KO9 or similar, I didnt save the info. Others may have it. 73 Carl KM1H To: <amps@contesting.com> __________________
/archives//html/Amps/1999-02/msg00224.html (12,661 bytes)

208. [AMPS] LK500-ZB Amp Supply ...help (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 16:17:21 -0500
Normal Indicates the HV and bias ckt working OK. What is the input VSWR at that point? Waste of time I suspect. Trace the RF path all the way thru to the grids, sounds like an open. Are the input net
/archives//html/Amps/1999-02/msg00225.html (9,429 bytes)

209. [AMPS] 470uF/450v caps for $2.25 (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sun, 7 Feb 1999 10:43:16 -0500
Temperature rating is only a part of the requirement Dick. Most consumer grade electrolytics 85 or 105 C are not able to withstand the ripple currents in a HV supply. Some of the better brands may ho
/archives//html/Amps/1999-02/msg00235.html (14,452 bytes)

210. [AMPS] Stability Question (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Sat, 6 Feb 1999 22:18:00 -0500
Sure is and not a reliable test of the amps operational stability. Try it with real world tuning values and then remove the load. A good layout should then be stable. In a perfect world what you are
/archives//html/Amps/1999-02/msg00243.html (11,396 bytes)

211. [AMPS] More on B&W 850 as tank coil (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Tue, 9 Feb 1999 10:53:17 -0500
I have no idea what thought patterns at B&W produced that tank coil. As I mentioned to you earlier the 850 was advertised for 2500 to 5000 Ohms. A reason for the rather strange 20-10M values could ha
/archives//html/Amps/1999-02/msg00270.html (11,022 bytes)

212. [AMPS] Stability Question (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Tue, 9 Feb 1999 10:54:22 -0500
Does that tube produce more power than the rest? Is it a different brand? You probably need 3 hands. Just barely start oscillating and tune the GDO; keep it as far away as necessary to get a half sca
/archives//html/Amps/1999-02/msg00272.html (15,362 bytes)

213. Fw: [AMPS] 470uF/450v caps for $2.25 (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Tue, 9 Feb 1999 10:19:18 -0500
On Mon, 8 Feb 1999 13:47:07 -0800 "Will K6NDV" <k6ndv@contesting.com> writes: I wish people would not try and put words in my mouth. BTW, Centralab as mentioned above should be CDE and the 381 series
/archives//html/Amps/1999-02/msg00273.html (11,869 bytes)

214. [AMPS] Re: Tuned inputs (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Wed, 10 Feb 1999 00:55:17 -0500
On Tue, 09 Feb 1999 16:36:20 +0000 "Jim Thomson" <jim_thomson@bctel.com> writes: Frank is 100% correct. Rich and I have said the same since the beginning of this reflector. Notice how many times I ha
/archives//html/Amps/1999-02/msg00289.html (8,004 bytes)

215. [AMPS] L4B Soft-Start SS-400 (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Tue, 9 Feb 1999 23:58:42 -0500
Sounds like a defective module Dave. Besides, why bother using one anyway? The L4B PS has sufficient inrush lag as designed, plate and filament. If you are using an external heavier duty replacement
/archives//html/Amps/1999-02/msg00290.html (8,796 bytes)

216. [AMPS] PI-L network inductor wire sizes (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Wed, 10 Feb 1999 01:18:25 -0500
Not likely. If the 50 Ohm current is 5-6A then there would not be any ham amps produced that would survive with 50-60A in L1. I would guess 2-3 times would be more in line with a good design. In my e
/archives//html/Amps/1999-02/msg00291.html (10,662 bytes)

217. [AMPS] Stability Question (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Wed, 10 Feb 1999 00:39:44 -0500
SNIP Start on 10 and work down since any change to the 10M L has affects on decending bands. Dont worry about 80 for now, I've never had problems down there with the 850 as-is. Trimmers vary roughly
/archives//html/Amps/1999-02/msg00292.html (10,570 bytes)

218. [AMPS] PI-L network inductor wire sizes (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Thu, 11 Feb 1999 00:34:33 -0500
On Wed, 10 Feb 1999 10:35:31 -0600 "Roy Koeppe" <royanjoy@ncn.net> writes: You might want to try the question again within the proper context. Start with a frequency. 73 Carl KM1H ___________________
/archives//html/Amps/1999-02/msg00309.html (7,801 bytes)

219. [AMPS] L4B Soft-Start SS-400 (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Wed, 10 Feb 1999 23:54:36 -0500
On Wed, 10 Feb 1999 06:21:09 -0800 "Will K6NDV" <k6ndv@contesting.com> writes: After 20-30 years switches fail but not as frequently as some of the soft start circuits.An amp turn-on failure is usual
/archives//html/Amps/1999-02/msg00310.html (11,222 bytes)

220. [AMPS] Edge wound .1-40 uH Variable from SSN - comments-? (score: 1)
Author: km1h@juno.com (km1h@juno.com)
Date: Thu, 11 Feb 1999 11:57:17 -0500
It sounds great but the proof is when it is used and survives several years of tuning. It also seems a bit of an overkill for an 8877. Many have reported problems with arcing and parasitics when a ro
/archives//html/Amps/1999-02/msg00318.html (10,861 bytes)

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