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References: [ +from:vk3zl@bigpond.com: 84 ]

Total 84 documents matching your query.

61. Re: [Amps] (Amps) our amplifier in 2010 CQWW (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Wed, 10 Nov 2010 13:04:31 +1100
Ya know, some of you guys reek of double standards and just plain old sour grapes...This site regularly promotes building and using amplifiers with YC156 tubes and many other high dissipation tubes..
/archives//html/Amps/2010-11/msg00123.html (6,731 bytes)

62. [Amps] Adjusting tuned input ckt for 6m amp, cold (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Fri, 19 Nov 2010 17:08:20 +1100
G'day John, use a 50 ohm resistor...This will put you into the ballpark.. Bob..VK3ZL.. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.co
/archives//html/Amps/2010-11/msg00343.html (6,330 bytes)

63. [Amps] Tube Cooling.. (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Tue, 23 Nov 2010 16:24:03 +1100
I have built several 2 x GI-7B amplifiers and cooling the tubes efficiently has always been a challenge...There are many retrofit Dentron, Heathkit etc amplifiers using GI-7 tubes using a single muff
/archives//html/Amps/2010-11/msg00386.html (7,201 bytes)

64. [Amps] Tube Cooling (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Thu, 25 Nov 2010 21:19:47 +1100
I am experimenting with a new 2 x GI-7B amplifier using muffin fan types to establish whether I can get reasonable air flow...Test 1 was using a pair of 240 volt 3.5 inch fans mounted beneath the tub
/archives//html/Amps/2010-11/msg00435.html (8,519 bytes)

65. [Amps] Tube cooling (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Fri, 26 Nov 2010 11:47:36 +1100
I have completed my experiment cooling 2 x GI-7BT tubes in a new 6 meter amplifier this morning... Final result is two 3.5 inch 240 volt muffin fans on the bottom cover blowing directly on to the fil
/archives//html/Amps/2010-11/msg00456.html (7,673 bytes)

66. [Amps] Tube Cooling (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Fri, 26 Nov 2010 18:34:52 +1100
Thanks all for the reply's to my post re cooling tubes with muffin fans..Yes roger, I do have the tubes compartmentised.... Carl, I have written down the papst model you specified, however no source
/archives//html/Amps/2010-11/msg00469.html (8,178 bytes)

67. [Amps] GS35B Needed.. (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Thu, 30 Dec 2010 11:45:52 +1100
The GS-35B cooler will not directly replace the GS-31B cooler...You can machine up a tapered adapter though....The GS-31B and GS-35B perform the same provided you have a sufficient cooling system...I
/archives//html/Amps/2010-12/msg00410.html (7,073 bytes)

68. [Amps] 2 meters GS-31B... (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Wed, 02 Feb 2011 11:33:30 +1100
Hi all, I am currently constructing a 2 meter EME amplifier for a local ham...The request is for an amplifier that will run 400 watts 1 minute data streams...I chose the GS-31B triode rather than use
/archives//html/Amps/2011-02/msg00009.html (6,739 bytes)

69. [Amps] Adhesive forTeflon sheet.. (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Mon, 21 Mar 2011 19:35:31 +1100
Hi All..Can someone enlighten me..I wish to attach Teflon sheet firmly to aluminum tuning discs with no chance of it coming off...What is the best type of adhesive for this purpose? Brand names in th
/archives//html/Amps/2011-03/msg00139.html (6,418 bytes)

70. [Amps] Adhesive for Teflon sheet.. (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Tue, 22 Mar 2011 10:10:46 +1100
Thank you for all the replys both here and email...I have enough information now and will be able to get on with the amplifiers...I am doing a couple of 70cm units for EME work using the GS-31B tubes
/archives//html/Amps/2011-03/msg00160.html (6,817 bytes)

71. [Amps] Teflon Chimneys (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Sat, 14 May 2011 18:33:07 +1000
Hi all...I have been thinking of ways to make Teflon Chimneys for GS-31 and 35B tubes from 1mm sheet...I am finishing off a 2 meter and a 70cm amplifier at present and would like some opinions... The
/archives//html/Amps/2011-05/msg00094.html (7,030 bytes)

72. [Amps] Teflon Chimneys.. (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Sun, 15 May 2011 13:52:03 +1000
Thanks for all the reply's re joining Teflon Sheet....The consensus appears to be nylon nuts and bolts followed by eylets or staples... Bob..VK3ZL.. _______________________________________________ Am
/archives//html/Amps/2011-05/msg00105.html (6,211 bytes)

73. [Amps] Anodised aluminum (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Mon, 17 Oct 2011 21:53:59 +1100
Hi all...I have just aquired a quantity of 2mm anodised aluminum sheet,, I am wondering if I remove the anodising from all contact surfaces if I can use this stock for rf deck cases... Cheers all....
/archives//html/Amps/2011-10/msg00043.html (6,288 bytes)

74. [Amps] Anodised aluminum (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Tue, 18 Oct 2011 19:11:52 +1100
I would like to thank you all for the helpful replies and emails regarding using anodised aluminum in amplfier boxes... The consensus is that it is quite ok to use provided bolts and rivets bond clea
/archives//html/Amps/2011-10/msg00054.html (8,104 bytes)

75. [Amps] Transfer Lettering (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Thu, 15 Mar 2012 17:35:56 +1100
I have been using rub on transfer lettreing for 35 years on all my home brew amplifiers, transmitters and accessory projects...There is a technique involved to really do a professional job but with p
/archives//html/Amps/2012-03/msg00180.html (8,669 bytes)

76. [Amps] 8877 (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Thu, 22 Mar 2012 21:48:08 +1100
Hi all..I have a new 8877 which has been stored in it's container unused for more than 30 years...After all this time I thought I might bring it to life if it was considered still useful...The code s
/archives//html/Amps/2012-03/msg00224.html (6,384 bytes)

77. [Amps] 3CX1500A&/8877 (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Mon, 30 Jul 2012 17:40:55 +1000
Interesting comments re the two types of tubes 8877/GS-35B...I have built six amplifiers using the GS-35B four on 160 meters and two on 6 meters...I have found that to make the 35B reasonably efficie
/archives//html/Amps/2012-07/msg00400.html (7,414 bytes)

78. [Amps] 3CX1500A vs el cheapo GS-35B (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Wed, 01 Aug 2012 12:38:08 +1000
Oh boy, what a bunch of grizzlers...I am having a real chuckle at some of the garbage being spouted here regarding the GS-35B tube...We are talking about a reasonably cheap to buy tube that amateurs
/archives//html/Amps/2012-07/msg00473.html (8,878 bytes)

79. [Amps] 3CX1500A vs el cheapo GS-35B.. (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Wed, 01 Aug 2012 13:11:18 +1000
Gee Bill, I didn't know you had such a school over there...We actually do the hard miles down under and don't think what we are doing but actually know what we are doing.. Bob..VK3ZL.. ______________
/archives//html/Amps/2012-07/msg00476.html (6,591 bytes)

80. [Amps] 3CX1500A vs el cheapo GS-35B.. (score: 1)
Author: Robert Briggs <vk3zl@bigpond.com>
Date: Wed, 01 Aug 2012 14:07:30 +1000
Olympics??? What has that got to do with the subject?? Never have nor ever likely to be interested in that crap..Keep on the subject.. Bob..VK3ZL.. _______________________________________________ Amp
/archives//html/Amps/2012-07/msg00479.html (6,692 bytes)

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