- 41. Re: [Amps] 'heat spreader' sizing ?? (score: 1)
- Author: Steve Thompson <g8gsq@f2s.com>
- Date: Sun, 06 Feb 2011 17:21:33 +0000
- Sorry, that should be AN10858. www.nxp.com/documents/application_note/AN10858.pdf Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.
- /archives//html/Amps/2011-02/msg00038.html (7,694 bytes)
- 42. Re: [Amps] how to recognize beryllium (score: 1)
- Author: Steve <g8gsq@f2s.com>
- Date: Wed, 09 Feb 2011 10:40:14 +0000
- You won't meet raw beryllium metal in rf power transistors. The material you're probably thinking of is Beryllium Oxide, BeO, often called Beryllia. It's the shiny white insulator between the leads a
- /archives//html/Amps/2011-02/msg00056.html (8,171 bytes)
- 43. Re: [Amps] 'heat spreader' sizing ?? (score: 1)
- Author: Steve Thompson <g8gsq@f2s.com>
- Date: Wed, 09 Feb 2011 22:36:11 +0000
- Certainly wasted at hf, and I'd have worries about ruggedness at lower frequencies. Its a 1200W transistor for 1200W peak out with digital radio or TV signals, which have a lower average power - but
- /archives//html/Amps/2011-02/msg00072.html (8,745 bytes)
- 44. Re: [Amps] 'heat spreader' sizing ?? (score: 1)
- Author: Steve Thompson <g8gsq@f2s.com>
- Date: Tue, 15 Feb 2011 22:30:36 +0000
- The transistor is primarily intended for use with DAB or DVT signals, which are complex multicarrier affairs. The 100us/10% duty is chosen as a simpler but representative way showing what performanc
- /archives//html/Amps/2011-02/msg00127.html (9,647 bytes)
- 45. Re: [Amps] GS35b FWB issue (score: 1)
- Author: Steve <g8gsq@f2s.com>
- Date: Wed, 13 Jul 2011 14:12:07 +0100
- That was my plan for my problem transformer. Absolutely, definitely, unconditionally MUST have MOVs and fuses on the primary side to protect the mains service from HV spikes should the primary insula
- /archives//html/Amps/2011-07/msg00153.html (7,804 bytes)
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