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101. Re: [Amps] LK 500 ZA heat (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Mon, 13 Aug 2007 21:16:21 -0400
Those stationary engines have been set up that way as far back as I can remember and Ive seen some that were built in the 1920's. Since they are often used in partially or fully enclosed areas they n
/archives//html/Amps/2007-08/msg00060.html (9,899 bytes)

102. Re: [Amps] LK 500 ZA heat (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 14 Aug 2007 09:23:05 -0400
Unless the fan and/or the blades are plastic and too close to the tubes as in the LK-500 series. The blades in the SB-220 turn brown from radiation after a few years use. Some even crack and fall apa
/archives//html/Amps/2007-08/msg00071.html (8,767 bytes)

103. Re: [Amps] LK 500 ZA heat (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 14 Aug 2007 09:32:21 -0400
And is seriously restricted in some amps by not having sufficient egress for the hot air. The LK-500, which is the title of this thread by the way, has less than 1/2 the area of the SB-220 for exhau
/archives//html/Amps/2007-08/msg00073.html (9,320 bytes)

104. Re: [Amps] Project for 8122 tubes (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 14 Aug 2007 09:51:57 -0400
The military used them at UHF in cavities. You could also look at the various 4CX250 VHF/UHF Handbook and magazine amps for circuits. Then adjust RF circuitry for the different values of the 8122. Th
/archives//html/Amps/2007-08/msg00074.html (8,421 bytes)

105. Re: [Amps] Project for 8122 tubes (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 14 Aug 2007 15:17:29 -0400
Not that Ive ever noticed. I have some used ones with late 60's date codes that are fine. I also picked up a distributed amp with 13 NOS 1983 date codes recently. They were all fine after a 5 minute
/archives//html/Amps/2007-08/msg00086.html (9,879 bytes)

106. Re: [Amps] [Fwd: Re: LK 500 ZA heat] (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 14 Aug 2007 22:16:39 -0400
You just said two very dirty words, Tom will now proceed to try and castrate you. BTW, my LK500ZC has many many hours behind it including several ARRL and CQ DX and WPX contest awards. I never once
/archives//html/Amps/2007-08/msg00089.html (9,101 bytes)

107. Re: [Amps] Amps Digest, Vol 56, Issue 20 (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 15 Aug 2007 13:12:20 -0400
If you provide ventilation space on the right hand side of the cabinet there is no need for additional fans, IMHO. Agree. The only problem with the LK-500 series is inadequate area for the hot air to
/archives//html/Amps/2007-08/msg00092.html (26,090 bytes)

108. [Amps] SB-200 ratings (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 15 Aug 2007 15:58:11 -0400
Its more complex than just drive power Lou. The 572B is rated at 50W drive per tube in typical ICAS operation. It is also rated at 250 ma Ip and 50 ma Ig per tube. The SB-200 manual states to increas
/archives//html/Amps/2007-08/msg00095.html (7,994 bytes)

109. [Amps] LK 500 ZA heat (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 15 Aug 2007 22:00:20 -0400
It must be a profitable venture just like snake oil was to the uneducated masses of the 19th century. I get many amps in here for repair that have that junk installed. The first thing I do is remove
/archives//html/Amps/2007-08/msg00098.html (8,652 bytes)

110. Re: [Amps] Amps Digest, Vol 56, Issue 19 (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Wed, 15 Aug 2007 22:28:50 -0400
Its fairly simple to convert the NCL-2000 to either a single 3CX800A7 or a pair of Russian 4CX400's. The last time I looked RF Parts had new Burle 8122's for around $450. The USAF has released many E
/archives//html/Amps/2007-08/msg00100.html (8,638 bytes)

111. Re: [Amps] wanted suitable blower for 8877 tube (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 18 Aug 2007 20:42:41 -0400
Does anyone have the specs on the AL-1500 blower? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-08/msg00112.html (9,051 bytes)

112. Re: [Amps] wanted suitable blower for 8877 tube (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 18 Aug 2007 22:28:38 -0400
So if the larger one is used then by slowing it down just a bit would keep the tube cool and reduce the noise somewhat, correct? Would it adequately handle two 8877's? Carl KM1H _____________________
/archives//html/Amps/2007-08/msg00117.html (9,737 bytes)

113. Re: [Amps] wanted suitable blower for 8877 tube (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 19 Aug 2007 10:04:08 -0400
Looking thru the EBM site I find no listings for the R2E series below 133. Are the ones you mentioned discontinued? www.ebmpapst.us/index.asp Carl KM1H _______________________________________________
/archives//html/Amps/2007-08/msg00122.html (12,314 bytes)

114. Re: [Amps] wanted suitable blower for 8877 tube (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 19 Aug 2007 16:53:06 -0400
Very true and that 27 cfm 085 series blower doesnt come close. Even the 56 cfm version drops to around 15 cfm at the 8877 spec. The EBM spec sheets have the curves for each model. I use one similar t
/archives//html/Amps/2007-08/msg00126.html (11,596 bytes)

115. Re: [Amps] 8877 blower (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Tue, 21 Aug 2007 15:16:42 -0400
Did it come with an autograph and certificate of authenticity? For that price back then they should have thrown in an 8877 as a little token of appreciation. Carl KM1H _______________________________
/archives//html/Amps/2007-08/msg00132.html (7,510 bytes)

116. [Amps] Correct way to drive an amp with controlled carrier AM? (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Thu, 23 Aug 2007 21:37:27 -0400
This question comes up regularly on the AM forums. In the latest query the guy wants to use a Heath DX 60. Using a SB-220 as the example how should it be run for maximum clean signal? What is the amp
/archives//html/Amps/2007-08/msg00152.html (7,059 bytes)

117. Re: [Amps] Correct way to drive an amp with controlled carrier AM? (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 24 Aug 2007 09:05:59 -0400
Thanks for that info Tom, Ive passed it along as well as your url. I had no idea that you even had any old Heathkits. Does the DX-35 suffer the same problems as the DX-60? I have one and may decide t
/archives//html/Amps/2007-08/msg00158.html (10,553 bytes)

118. Re: [Amps] Heathkit cabinets (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 24 Aug 2007 16:24:16 -0400
The SB-200 is hinged. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-08/msg00162.html (7,229 bytes)

119. Re: [Amps] SELL: Heat Dissipating 8877 HV Plate Caps (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 24 Aug 2007 17:15:12 -0400
Other than creating a market that doesnt exist there is no reason for one of those caps. It falls into the same category as voodoo parasitic suppressors, and step starts. Carl KM1H __________________
/archives//html/Amps/2007-08/msg00163.html (11,283 bytes)

120. Re: [Amps] SELL: Heat Dissipating 8877 HV Plate Caps (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 24 Aug 2007 21:51:13 -0400
A fool and his money are soon seperated. Carl In a message dated 8/24/2007 5:15:53 P.M. Eastern Daylight Time, km1h@jeremy.mv.com writes: Other than creating a market that doesnt exist there is no re
/archives//html/Amps/2007-08/msg00166.html (7,833 bytes)

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