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1. [AMPS] Grid block keying of SB200 for QSK??? (score: 1): Author: wb4mnf@atl.org (Bob Duckworth); Date: Mon, 5 Feb 2001 08:31:52 -0500; Has anyone tried grid block keying of SB200? No manual and wanted to ask a couple of questions before pulling it out of the cabinet. I have a Heath HW-16. This is a low power transmitter and receiver; /archives//html/Amps/2001-02/msg00110.html (7,727 bytes)
2. [AMPS] Grid block keying of SB200 for QSK??? (score: 1): Author: wb4mnf@atl.org (Bob Duckworth); Date: Mon, 5 Feb 2001 09:00:21 -0500; Thinking about this a bit more, What if I just unground the 2 x T-160L grids to key. I have a few spare 500V MOSFETs. -- From: Bob Duckworth <wb4mnf@atl.org> To: amps <amps@contesting.com> To: <amps@; /archives//html/Amps/2001-02/msg00112.html (8,447 bytes)
3. [AMPS] Grid block keying of SB200 for QSK??? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 05 Feb 2001 08:00:19 -0800; Look at the QSK circuit on Rich Measures' web site, http://www.vcnet.com/measures/ It includes an 'Electronic Cathode Bias Switch' which cuts off the tubes on ket up. I've used this circuit successfu; /archives//html/Amps/2001-02/msg00118.html (7,357 bytes)
4. [AMPS] Grid block keying of SB200 for QSK??? (score: 1): Author: wb4mnf@atl.org (Bob Duckworth); Date: Tue, 6 Feb 2001 09:08:05 -0500; Thanks for suggesitons. and Thanks BAMA! It sure helps to have a schematic. SB200 has grids at RF ground and cuts tubes off with a neg bias to grids. I'm going to nip the wire, lock the relays down a; /archives//html/Amps/2001-02/msg00130.html (7,359 bytes)

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