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141. [AMPS] YC-156 Input impedance (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 1 Oct 2001 21:22:58 -0500; This is a multi-part message in MIME format. --=_NextPart_000_0163_01C14ABF.3E066520 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It is 25 ohms. The data; /archives//html/Amps/2001-10/msg00009.html (10,548 bytes)
142. [AMPS] YC-156 Input impedance (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 3 Oct 2001 00:42:20 -0500; Phil Clements 410 VZ CR 4903 Ben Wheeler, TX 75754 Wrong, Kimo-Sabe! The Eimac data sheet plainly states that typical performance (measured data) to 30 mhz that the cathode input impedance is 24 ohms; /archives//html/Amps/2001-10/msg00025.html (10,117 bytes)
143. [AMPS] YC-156 Input impedance (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 3 Oct 2001 12:11:38 -0500; The response to your post to me and the reflector was tailored you your terse and pithy remarks. It is very sad that you have no sense of humor, and hate to be proven wrong. I gave the guy good advic; /archives//html/Amps/2001-10/msg00045.html (11,962 bytes)
144. [AMPS] YC-156 Input impedance (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 3 Oct 2001 12:16:09 -0500; Fixed tuned inputs with a Q of 5 or better are hard to come up with if one wishes to cover an entire band. (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@con; /archives//html/Amps/2001-10/msg00046.html (8,070 bytes)
145. [AMPS] SB-220 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 3 Oct 2001 14:46:21 -0500; They don't even want the box to be opened! The minute construction is begun, the price drops about $2 grand on a 220. E-Bay never ceases to amaze me....Collins, Drake, and un-built Heaths bring unbe; /archives//html/Amps/2001-10/msg00051.html (7,705 bytes)
146. [AMPS] Problem with AL-811H (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 3 Oct 2001 16:32:39 -0500; Sage advice, Carl. I have seen that several times. Also, he can check to make sure the path from the blocking caps to the antenna connector is not open. Of course, the antenna relay will have to be; /archives//html/Amps/2001-10/msg00057.html (7,867 bytes)
147. [AMPS] ALPHA 374A (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 5 Oct 2001 13:29:50 -0500; Was there not also a "manual tune" 374? The 76 series also had various numbers of tubes, depending on model #. (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@; /archives//html/Amps/2001-10/msg00091.html (7,989 bytes)
148. [AMPS] Tuned Input Circuit Q (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 5 Oct 2001 20:37:38 -0500; A nifty disk came with the 1996 ARRL Handbook. Among the programs is "pinet." I find this useful in starting out with a new design. You are asked to input R2, which is Rout, C(min), Q, and steps for; /archives//html/Amps/2001-10/msg00106.html (8,866 bytes)
149. [AMPS] Re: [amps] Fans and Henry Kissinger (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Fri, 5 Oct 2001 20:44:31 -0500; Nicely done, Steve! Thanks for helping Xu out. " Each failure usually buys an admission ticket to a more expensive solution." Phil Clements (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.co; /archives//html/Amps/2001-10/msg00107.html (7,710 bytes)
150. [AMPS] Tuned Input Circuit Q (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 7 Oct 2001 09:07:51 -0500; Or the old Alpha trick of using an un-un transformer with parallel tuned networks (when adding a second 8877 in the 77DX) can be employed. This is much easier than trying to tweak a pi network for e; /archives//html/Amps/2001-10/msg00140.html (8,764 bytes)
151. [AMPS] CIRCUIT BREAKER FOR TRANSFORMER PRIMARY CIRCUIT (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 7 Oct 2001 15:35:29 -0500; I do about the same thing here. Each of my amps have their own dedicated 240 volt outlet, with breakers in the electric mains junction box sized to the load of each. As back-up, I use the large Buss; /archives//html/Amps/2001-10/msg00149.html (8,293 bytes)
152. [AMPS] Tuned Input Circuit Q (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 7 Oct 2001 15:52:13 -0500; My comments were related directly to Alpha amps, Rich. Alpha did not use pi network input circuits in the 77 series amps. To prevent drilling many holes and adding expense, the "two-tube" kits furni; /archives//html/Amps/2001-10/msg00150.html (9,616 bytes)
153. [AMPS] CIRCUIT BREAKER FOR TRANSFORMER PRIMARY CIRCUIT (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 7 Oct 2001 17:10:52 -0500; Great point, Bill! That is why I always have the fuses in each power supply as a back-up. I learned a lot about CB's in my 33 year career as an airline pilot. Using them as "on-off" switches will we; /archives//html/Amps/2001-10/msg00153.html (8,374 bytes)
154. [AMPS] Tuned Input Circuit Q (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sun, 7 Oct 2001 21:35:36 -0500; Alpha thought otherwise for years. Denny Had thought otherwise for years. Eimac still honored their warranty, and the FCC did not seem to care. (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesti; /archives//html/Amps/2001-10/msg00159.html (8,637 bytes)
155. [AMPS] Tuned Input Circuit Q (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 8 Oct 2001 12:06:08 -0500; You are taking me out of context, Tom. I was replying to Rich's statement that Eimac recommends a pi input network. I was just pointing out that using a parallel network (or none at all) will not vo; /archives//html/Amps/2001-10/msg00177.html (9,357 bytes)
156. [AMPS] Tuned Input Circuit Q (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Mon, 8 Oct 2001 12:14:09 -0500; That is my point, exactly. They can also be met and exceeded with a parallel or T network. (((73))) Phil, K5PC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Admi; /archives//html/Amps/2001-10/msg00178.html (7,801 bytes)
157. [AMPS] CW/SSB Tune Up (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 9 Oct 2001 01:14:40 -0500; 2nd harmonic is down c. 60 db and third order better than -35 db on this puppy. (8-K Ultra) The beauty is that since the tune C's are fixed door knobs and the Pi and L coils are ganged together with; /archives//html/Amps/2001-10/msg00212.html (8,456 bytes)
158. [AMPS] FW: BOUNCE amps@contesting.com : Non-member submission from ["Mike McCarthy, W1NR" <w1nr@eecorp.com>] (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 10 Oct 2001 12:29:39 -0500; The 802 is physically the same as an 800, just a few more turns. If you don't have a dip meter to find the resonances with the choke mounted in place in the amp, You can make an 800 out of an 802 jus; /archives//html/Amps/2001-10/msg00268.html (7,950 bytes)
159. [AMPS] Installation of Harbach Kits (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Tue, 16 Oct 2001 15:18:11 -0500; This is a multi-part message in MIME format. --=_NextPart_000_000C_01C15655.C5060700 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Now that Jeff has Har; /archives//html/Amps/2001-10/msg00346.html (7,946 bytes)
160. [AMPS] AL-82 Primary Tap Settings (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 17 Oct 2001 09:42:55 -0500; The only way to properly set the transformer taps is to measure the filament voltage at the tube pins at each setting. I would start with the 220 volt tap first. If the voltage is within specs, you a; /archives//html/Amps/2001-10/msg00359.html (8,253 bytes)

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