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Total 218 documents matching your query.

121. Re: [Amps] What is the best way to run a pair of 4-1000 tubes (score: 1)
Author: "k7rdx" <>
Date: Sun, 23 Dec 2007 16:15:04 -0800
When I built my pair of 4-1000`s (GG/1972) I used very short plated strap for the plate leads and located the parasitic supressor at the cathodes ...Worked fine on 10 &15 meters,at slightly reduced e
/archives//html/Amps/2007-12/msg00222.html (16,959 bytes)

122. Re: [Amps] HV Supplies and Diodes (score: 1)
Author: "k7rdx" <>
Date: Thu, 3 Jan 2008 12:23:03 -0800
Larry`s right about the encapsulated diodes...The stacks are neat appearing and easy to mount but the leads are where most of the heat dissipates...I can prove that by looking at diodes in a working
/archives//html/Amps/2008-01/msg00037.html (16,907 bytes)

123. Re: [Amps] GG input impedances (score: 1)
Author: "k7rdx" <>
Date: Sun, 10 Feb 2008 09:35:24 -0800
WD7S productions has a graph of input/output/plate load impedance,etc values for nearly all popular GG tubes used by hams..Listed with his TU-6B tuned input board ad. Nice QRO parts and great guy to
/archives//html/Amps/2008-02/msg00049.html (8,774 bytes)

124. [Amps] Items fs (score: 1)
Author: "k7rdx" <>
Date: Mon, 11 Feb 2008 10:06:13 -0800
I have three items surplus to my needs:CVCD-2000/5KV ceramic vacuum variable 20-2000pf,5kvdc rated,hipot tested to 10kv,nice used condition 150.00.UCS-200/10KV no drive with this one,tested 50.00. Jo
/archives//html/Amps/2008-02/msg00053.html (6,468 bytes)

125. Re: [Amps] Items fs (score: 1)
Author: "k7rdx" <>
Date: Wed, 13 Feb 2008 17:37:05 -0800
_______________________________________________ Amps mailing list
/archives//html/Amps/2008-02/msg00086.html (7,959 bytes)

126. Re: [Amps] Oil-caps delating 2/3 ratings? (score: 1)
Author: "k7rdx" <>
Date: Thu, 6 Mar 2008 10:36:57 -0800
Gerald,how did your capacitors fail? Did they short internally? Did they rupture?In my experiance over the years with oil filled caps, I have found the pressed case types are generally designed for u
/archives//html/Amps/2008-03/msg00054.html (11,610 bytes)

127. Re: [Amps] Questions about Amps/Tubes/Design (score: 1)
Author: "k7rdx" <>
Date: Sat, 15 Mar 2008 18:53:33 -0700
Nice clean used band switch removed from DTR-2000L for sale:50.00 shipped USA..Pse contact me off list:Jim,K7RDX... -- Original Message -- From: "jeremy-ca" <> To: "Gary Hinson" <Ga
/archives//html/Amps/2008-03/msg00136.html (13,729 bytes)

128. Re: [Amps] Henry 2K-3 PS Mod (score: 1)
Author: "k7rdx" <>
Date: Fri, 21 Mar 2008 14:14:11 -0700
There`s a good possibility of future problems because the plate transformer may not be rated for capacitor input filtering with the increased heating effect.Also,the hv supply couldn`t be nearly as r
/archives//html/Amps/2008-03/msg00196.html (10,159 bytes)

129. Re: [Amps] Relays (score: 1)
Author: "k7rdx" <>
Date: Sun, 30 Mar 2008 17:36:30 -0700
Very nice construction Mike..Very well thought out design and workmanship!73,Jim K7RDX.... -- Original Message -- From: "Mike Bondarev" <> To: "'Amps'" <> Sent:
/archives//html/Amps/2008-03/msg00375.html (9,386 bytes)

130. Re: [Amps] YC-156 grid ring (score: 1)
Author: "k7rdx" <>
Date: Thu, 3 Apr 2008 14:33:53 -0700
Andy`s grid mounting ring is very nice.I also made mounting devices for both my 156 amps in use here..My first design was a rectangular plate cut to mate the chassis,tube and SK-306 chimney. That one
/archives//html/Amps/2008-04/msg00083.html (11,396 bytes)

131. Re: [Amps] 12v interruption (score: 1)
Author: "k7rdx" <>
Date: Wed, 16 Apr 2008 13:15:09 -0700
The racing boats I am familiar with use a plug inserted into a kill switch mounted close to the driver...A kevlar cord is attatched to the plug and to the drivers wrist..In the event of an emergency,
/archives//html/Amps/2008-04/msg00222.html (9,069 bytes)

132. Re: [Amps] Amps Digest, Vol 64, Issue 29 (score: 1)
Author: "k7rdx" <>
Date: Fri, 18 Apr 2008 10:11:12 -0700
The reasoning for removing the negative terminal first is the fact that the metalic tool used for removal could come into contact with the grounded structure of the car...Not a good thing if you remo
/archives//html/Amps/2008-04/msg00243.html (9,236 bytes)

133. Re: [Amps] Alpha 8410 (score: 1)
Author: "k7rdx" <>
Date: Tue, 20 May 2008 21:17:24 -0700
Don`t be too sure Bob...Have you checked prices lately for "good" parts?When it was let out about PD quitting business,every availiable HV transformer suddenly became worth nearly twice as much ...Ki
/archives//html/Amps/2008-05/msg00148.html (8,952 bytes)

134. [Amps] Alpha 77dx (score: 1)
Author: "k7rdx" <>
Date: Fri, 6 Jun 2008 08:52:06 -0700
Does anyone know what a clean 77dx (2 tube)is worth on todays market? Replys off list pse...Thanks,Jim,K7RDX.. _______________________________________________ Amps mailing list ht
/archives//html/Amps/2008-06/msg00040.html (6,141 bytes)

135. Re: [Amps] Alpha 77dx (score: 1)
Author: "k7rdx" <>
Date: Fri, 6 Jun 2008 13:03:25 -0700
Hell of a response guys....I am amazed! Have at it:Ebay#290236449389...A few of you guys say 6-8k for a nice one...I have to admit having spent about 800 building my single 8877 and (Blush) around 5k
/archives//html/Amps/2008-06/msg00052.html (9,202 bytes)

136. Re: [Amps] Alpha 77dx (score: 1)
Author: "k7rdx" <>
Date: Mon, 9 Jun 2008 16:56:43 -0700
I think the listing disappeared...Check it out..I asked for an inspection too..No response...He probably got an offer he couldn`t refuse,pulled the ad and sold the amp off ebay to blitz the fees..I s
/archives//html/Amps/2008-06/msg00078.html (15,385 bytes)

137. Re: [Amps] Alpha 77dx (score: 1)
Author: "k7rdx" <>
Date: Mon, 9 Jun 2008 18:01:55 -0700
Ebay is trying to get more truthful buyer feedback by not allowing the seller to give retailatory feedback after the buyer gives a negitive. There will always be a few scammers&cheaters in the system
/archives//html/Amps/2008-06/msg00083.html (11,245 bytes)

138. Re: [Amps] 3CPX800A7 Pulls (score: 1)
Author: "k7rdx" <>
Date: Sun, 22 Jun 2008 07:30:17 -0700
Ctr also has YC-156 pulls..I have purchased at least 10 in the past few years and all have been very good...Also,they package properly and ship fast.Jim,K7RDX.. -- Original Message -- From: "Dennis W
/archives//html/Amps/2008-06/msg00176.html (8,379 bytes)

139. [Amps] Alpha amps HV supplys (score: 1)
Author: "k7rdx" <>
Date: Sun, 22 Jun 2008 18:35:25 -0700
Did any of the early Alpha amps use a doubler for the hv? Thanks in advance,Jim,K7RDX.. _______________________________________________ Amps mailing list http://lists.contesting.c
/archives//html/Amps/2008-06/msg00184.html (6,222 bytes)

140. Re: [Amps] Silver Strap (score: 1)
Author: "k7rdx" <>
Date: Mon, 7 Jul 2008 10:43:39 -0700
Try: Frontier Engineering..I purchased silvered strap from them a few yrs ago for a very reasonable price..73,Jim..K7RDX.. -- Original Message -- From: "Bob Maser" <bmaser@tampabay.rr.c
/archives//html/Amps/2008-07/msg00056.html (7,414 bytes)

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