- 1. [Amps] 4CX800/GU74B Socket (score: 1)
- Author: vk4tzl@bigpond.net.au (Glenn McNeil)
- Date: Fri, 14 Jun 2002 16:33:26 +1000
- Hi Guys... I'm about to start construction for a 2 meter linear using a GU74B ( 4CX800 ). The socket I have is a military one, with built in chimney and an external screen ring. This ring makes conta
- /archives//html/Amps/2002-06/msg00087.html (7,935 bytes)
- 2. [Amps] 4CX800/GU74B Socket (score: 1)
- Author: g8gsq@qsl.net (Steve Thompson)
- Date: Fri, 14 Jun 2002 10:27:13 +0000
- The key point is whether the screen has a low impedance to ground at frequencies where the circuit can deliver much gain. In the usual '250 bases and in the Svetlana SK-1 base, the screen cap is sand
- /archives//html/Amps/2002-06/msg00088.html (8,664 bytes)
- 3. [Amps] 4CX800/GU74B Socket (score: 1)
- Author: yo9fzs@office.deck.ro (yo9fzs)
- Date: Fri, 14 Jun 2002 15:29:43 +0300
- Hello Glenn I have somewhere inside my boxes a socket like yours, it have three or four capacitors, but are of the high voltage ceramic "chip" type ones (multilayer), without terminals, with their pa
- /archives//html/Amps/2002-06/msg00089.html (9,209 bytes)
- 4. [Amps] 4CX800/GU74B Socket (score: 1)
- Author: 2@mail.vcnet.com (Richard)
- Date: Fri, 14 Jun 2002 05:59:53 -0700
- A low-Z screen bypass is essential unless one is building an oscillator. Depending on lead lengths, a 1000pF disc-cap exhibits capacitive reactance up to around 50MHz - where it is resonant. Above r
- /archives//html/Amps/2002-06/msg00090.html (9,164 bytes)
- 5. [Amps] 4CX800/GU74B Socket (score: 1)
- Author: kb7ww@easystreet.com (Arthur Moe)
- Date: Fri, 14 Jun 2002 13:47:42 +0000
- Glen, Why not run the Screen grounded. This is a very acceptable way of running tetrodes. There is information on the web. Art KB7WW
- /archives//html/Amps/2002-06/msg00091.html (8,701 bytes)
- 6. [Amps] 4CX800/GU74B Socket (score: 1)
- Author: g0ruz@btinternet.com (Conrad G0RUZ)
- Date: Fri, 14 Jun 2002 16:06:11 +0100
- Hi Guys... I'm about to start construction for a 2 meter linear using a GU74B ( 4CX800 ). The socket I have is a military one, with built in chimney and an external screen ring. This ring makes conta
- /archives//html/Amps/2002-06/msg00092.html (8,675 bytes)
- 7. [Amps] 4CX800/GU74B Socket (score: 1)
- Author: 2@mail.vcnet.com (Richard)
- Date: Fri, 14 Jun 2002 08:28:42 -0700
- Good point, Dick. However, the screen needs to be grounded with a low-L spring-finger collet as directly as possible to the chassis. [see Figure 5 on my Web site for an overview of grounded-screen o
- /archives//html/Amps/2002-06/msg00093.html (7,607 bytes)
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