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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Heat\s+Dissapating\s+8877\s+HV\s+Plate\s+Caps\s*$/: 7 ]

Total 7 documents matching your query.

1. [Amps] Heat Dissapating 8877 HV Plate Caps (score: 1)
Author: "robert briggs" <vk3zl@bigpond.com>
Date: Sat, 25 Aug 2007 11:53:52 +1000
Interesting to note all the crapola over the heat dissapating caps.In a number of HFamplifiers I have built I have used these caps on metal ceramic tubes.Whats wrong with a bit of extra metal to assi
/archives//html/Amps/2007-08/msg00167.html (6,599 bytes)

2. Re: [Amps] Heat Dissapating 8877 HV Plate Caps (score: 1)
Author: "Gary Schafer" <garyschafer@comcast.net>
Date: Fri, 24 Aug 2007 21:55:54 -0500
To each his own. But from my point of view if there was to be anything gained the tube manufacturer would have put fins on that part of the tube. I would also guess that they would have had the fins
/archives//html/Amps/2007-08/msg00168.html (8,029 bytes)

3. Re: [Amps] Heat Dissapating 8877 HV Plate Caps (score: 1)
Author: "Fern Rivard" <crc@cyberlink.bc.ca>
Date: Fri, 24 Aug 2007 22:20:58 -0600
For crying out loud! Which way are the plates on all of the other plate dissipating caps oriented? Look at those for 813's, 4-400's, 4-1000's.....they'e all with horizontal fins. I don't recall seein
/archives//html/Amps/2007-08/msg00169.html (9,325 bytes)

4. Re: [Amps] Heat Dissapating 8877 HV Plate Caps (score: 1)
Author: n7ka@comcast.net
Date: Sat, 25 Aug 2007 05:45:36 +0000
All those tubes you mention can be called bottles. Anodes inside a glass envelope. The cooling from these tubes involved air passing around the glass envelope. And yes they use a plate cap with horiz
/archives//html/Amps/2007-08/msg00171.html (13,049 bytes)

5. Re: [Amps] Heat Dissapating 8877 HV Plate Caps (score: 1)
Author: Steve Thompson <g8gsq@eltac.co.uk>
Date: Sat, 25 Aug 2007 07:53:22 +0100
Just to emphasise a point here - the cap that covers the pinchoff is thin metal, with barely any contact onto the rest of the anode metalwork. The heatflow into/through it is negligible. It certainly
/archives//html/Amps/2007-08/msg00172.html (8,447 bytes)

6. Re: [Amps] Heat Dissapating 8877 HV Plate Caps (score: 1)
Author: "Tom Rauch" <w8ji@contesting.com>
Date: Sun, 26 Aug 2007 00:05:34 -0400
Tubes with large stems through glass or ceramic envelope often need heat dissipation from the seal area. The better heatsinks have vertical fins or fins oriented in line with the airflow, although a
/archives//html/Amps/2007-08/msg00180.html (8,921 bytes)

7. Re: [Amps] Heat Dissapating 8877 HV Plate Caps (score: 1)
Author: "Roger" <sub1@rogerhalstead.com>
Date: Sun, 26 Aug 2007 02:11:31 -0400
When I worked in the semiconductor industry our *low power* RF induction heating units used a pair of large glass triodes that were physically about the size of a 4-1000A. The radiators that attache
/archives//html/Amps/2007-08/msg00183.html (8,835 bytes)

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