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141. Re: [Amps] more sb220 questions (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 02 Sep 2005 07:46:53 -0400; John, There's several thing that could cause no power output from the amp. That zener diode being one which I'd check first. It sets the tubes bias on transmit. No heater voltage. No high voltage wou; /archives//html/Amps/2005-09/msg00005.html (8,032 bytes)
142. Re: [Amps] power supply capacitors (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 03 Sep 2005 12:10:14 -0400; Mike, Did the seller say anything that they might be photo-flash capacitors? Photo-flash caps are made to be charged quickly and held for a quick discharge into a flash bulb and not for filtering. Th; /archives//html/Amps/2005-09/msg00021.html (9,206 bytes)
143. Re: [Amps] Spike Caps (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 03 Sep 2005 14:14:11 -0400; Rich, You wouldn't need 10 kV capacitors there as the HV is divided equally across the rectifiers. If there's say 1 kV across each, you can use a 1.5-2 kV ceramic disc capacitor say at .01 uF (10,000; /archives//html/Amps/2005-09/msg00023.html (7,389 bytes)
144. Re: [Amps] CW and High Voltage (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 03 Sep 2005 21:43:02 -0400; Steve, Cutting the drive back too much will indeed cause a good size mismatch and would need to be fine tuned some. The reason being is when the power drops, the plate impedance changes accordingly.; /archives//html/Amps/2005-09/msg00028.html (11,559 bytes)
145. Re: [Amps] CW and High Voltage (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 03 Sep 2005 22:28:19 -0400; Guillermo, You'd have to tune it for the most power you could get with a compromise of the cleanest obtainable signal. In other words, you want the cleanest signal you can get, but the most power you; /archives//html/Amps/2005-09/msg00030.html (14,447 bytes)
146. Re: [Amps] Spike Caps (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 03 Sep 2005 22:41:22 -0400; Rich, Your correct! I figured the diodes you were using were series strings as most use. You would need to use something similar to what you have. Good practice is to use a capacitor with a voltage r; /archives//html/Amps/2005-09/msg00031.html (8,399 bytes)
147. Re: [Amps] CW and High Voltage (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 04 Sep 2005 11:19:12 -0400; Phil, That's true. I have seen some built though that has a low power using 1/2 plate voltage and those pretty much needs to be retuned too. Of course thats changing the plate voltage not power input; /archives//html/Amps/2005-09/msg00040.html (10,325 bytes)
148. Re: [Amps] Alpha releases New Amp 9500 (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 17 Sep 2005 19:05:34 -0400; Dave, You can buy a serial port adapter card for about $10-$15 bucks (maybe less now) if I recall. I have a few of them laying around here. The cards take a whole 5 minutes at the most to install if; /archives//html/Amps/2005-09/msg00186.html (10,641 bytes)
149. Re: [Amps] Drying out HV transformers / Chokes (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 18 Sep 2005 10:54:42 -0400; Don, You can use an electric space heater too. One like the old "milk-barn" types works well. Just set the transformer up with its layers open to the heater about 6-8 inches away. You may have to tur; /archives//html/Amps/2005-09/msg00208.html (9,479 bytes)
150. [Amps] e-mail (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 18 Sep 2005 11:11:36 -0400; I got an e-mail today supposedly from an online greeting card website. The e-mail says "a member of your family has sent you a greeting card, click on the link below to retrieve it", or something sim; /archives//html/Amps/2005-09/msg00209.html (6,817 bytes)
151. [Amps] BendWorks (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 18 Sep 2005 12:39:30 -0400; A while back, a few was wondering about the calculations for sheet metal bending to be used to fabricate their own chassis. Below is a link to a free app to calculate this called BendWorks. If any ar; /archives//html/Amps/2005-09/msg00212.html (7,171 bytes)
152. Re: [Amps] Responses to: Drying out HV transformers / Chokes (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sun, 18 Sep 2005 21:59:29 -0400; Don, I can't really comment on nothing but using the space heaters as I have actually done this. I used the same process to dry out TV chassis that had been in a flood and then washed out. After dryi; /archives//html/Amps/2005-09/msg00223.html (28,701 bytes)
153. Re: [Amps] Suggestions for new Alpha Owner? (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Tue, 27 Sep 2005 16:19:12 -0400; Kenneth and others, I'm not for sure on this but I think Rich was refering to the SB-220 plate choke. I almost got it confused myself whether he was speaking of the Alpha or the Heath. One can test t; /archives//html/Amps/2005-09/msg00337.html (9,636 bytes)
154. Re: [Amps] Emtorn DX3 problem (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 30 Sep 2005 12:20:58 -0400; Lon, Is this modem an external device? If so, have him to take some aluminum foil and wrap the modem up good, shileding it, just letting the wires come out. Take a jumper lead and attach one end to t; /archives//html/Amps/2005-09/msg00383.html (8,683 bytes)
155. Re: [Amps] Ameritron AL-811H-- Again (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 30 Sep 2005 20:00:49 -0400; Bob, I gotta say, the writer of that letter sounded like he was surely mad about something. When an amp is built cheap, it's cheap and no matter how much paint and flashing lights you add to the outs; /archives//html/Amps/2005-09/msg00396.html (16,078 bytes)
156. Re: [Amps] Millen dipper (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 30 Sep 2005 20:04:14 -0400; Carl, Your better off to use a frequency counter always to check the frequency of any dip meter and never trust the scale to be correct. Just put a small coil, say 10 turns and about 3/4" I.D. on the; /archives//html/Amps/2005-09/msg00397.html (7,626 bytes)
157. Re: [Amps] Ameritron AL-811H-- Again (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 30 Sep 2005 20:17:54 -0400; Bob, Gimme a Drake L4-B any day and I'm satisfied. The SB-220 is a good choice but you may have to re-work bad construction techniques as you never know who built it. Same as the rest of the Heath pr; /archives//html/Amps/2005-09/msg00401.html (19,495 bytes)
158. [Amps] Question (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 01 Oct 2005 08:59:09 -0400; How can you "getter" a tube by an arc over a bad vacuum? How can just an arc cause the amount of gas in a gassy tube to drop? We're not talking about using true getters here, just an arc happening in; /archives//html/Amps/2005-10/msg00006.html (6,899 bytes)
159. Re: [Amps] Question (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 01 Oct 2005 13:12:30 -0400; William, That's the way I always heard it too! ** REPLY SEPARATOR ** _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo; /archives//html/Amps/2005-10/msg00012.html (8,841 bytes)
160. Re: [Amps] Outgassing tubes. (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Sat, 01 Oct 2005 13:23:34 -0400; George, Yup, I have heard some call this gettering too which really isn't the correct term per say, but understand what they're trying to do. I always called it "burning them in", but it's the same t; /archives//html/Amps/2005-10/msg00013.html (8,678 bytes)

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