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References: [ +from:mike@tubby.org: 69 ]

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61. Re: [Amps] Need small chain and sprockets for tuner project (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Sat, 01 Feb 2014 00:25:21 +0000
Small Parts Inc. Miami Lakes, FL Catalog #22 Page 272 onwards... http://www.smallparts2.com/pdf-catalog/Small-Parts-Catalog_22.pdf _______________________________________________ Amps mailing list Am
/archives//html/Amps/2014-01/msg00352.html (10,403 bytes)

62. Re: [Amps] SOURCE FOR 3CX800'S (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Wed, 15 Oct 2014 22:46:43 +0100
Steve, The 3CX800 is becoming a premium and "hard to get" tube... have you considered modifying the Alpha to use 4CX800 (GU-74B) tubes which are plentiful and cheaper? Regards Mike G8TIC Recently pic
/archives//html/Amps/2014-10/msg00064.html (7,363 bytes)

63. Re: [Amps] Alpha 76 "SNAP" noise (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Wed, 14 Jan 2015 11:06:32 +0000
I suggest that you change the caps and the equalising resistors too! Our Henry Tempo 2002A started making fizzing and crack noises some 12+ years ago during a contest. L:uckily at the time I had a sp
/archives//html/Amps/2015-01/msg00106.html (9,559 bytes)

64. Re: [Amps] Tetrode software (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Sat, 02 May 2015 22:50:59 +0100
When I want to run old 16-bit or 32-bit DOS programs or console apps I use a program called DOSBox: http://en.wikipedia.org/wiki/DOSBox which runs on Win-7 and Win-8 64 bit machines. Mike G8TIC On 02
/archives//html/Amps/2015-05/msg00016.html (12,744 bytes)

65. Re: [Amps] SPE 2K-FA amplifier duty cycle (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Mon, 18 May 2015 23:42:26 +0100
Please take the following with a "pinch of salt" (or whatever caution you prefer)... I cannot speak for the SPE 2K-FA but I have used an SPE 1K-FA in WPX two years on the bounce. At UK licensed power
/archives//html/Amps/2015-05/msg00137.html (9,349 bytes)

66. Re: [Amps] Time to ask for help. (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Sat, 25 Jul 2015 22:28:40 +0100
Hi Roger, Is the design single-ended or push-pull? Have you checked out your RF deck by removing each tube and replacing it with a carbon resistor of/at/near the resistive load (RL) for the tube oper
/archives//html/Amps/2015-07/msg00135.html (10,570 bytes)

67. Re: [Amps] Follow-up...re: Time to ask for help. (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Mon, 27 Jul 2015 20:01:58 +0100
I've looked at the schematic. As you have SK640 sockets why not modify the design to run "grounded screen" ... like the 144MHz 4CX1000A design in the 1990 ARRL handbook? You would connect B- to the c
/archives//html/Amps/2015-07/msg00162.html (15,378 bytes)

68. Re: [Amps] Question on installing new Amp tube (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Sat, 8 Aug 2015 16:59:22 +0100
If the 3-500Z has stood for a long time unused I suggest you use the 'Reactivation 3-500Z' procedure by PA0FRI, here: http://pa0fri.home.xs4all.nl/Lineairs/TL922/tl-922eng.htm When I did this with a
/archives//html/Amps/2015-08/msg00005.html (9,032 bytes)

69. Re: [Amps] Question on installing new Amp tube (score: 1)
Author: Mike Tubby <mike@tubby.org>
Date: Sat, 8 Aug 2015 19:26:24 +0100
Lee, I think you may be confusing two unrelated issues ... The 'Reactivation' that PA0FRI describes is a process of making a tube work again. The 3-500Z is a directly heated cathode, i.e. the filamen
/archives//html/Amps/2015-08/msg00010.html (11,850 bytes)

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