- 1. [Amps] FW: Zener Bias Replacement (score: 1)
- Author: "Larry Carman" <lncarman@swbell.net>
- Date: Mon, 6 Nov 2006 11:14:06 -0600
- No problem at all. When I need a higher bias voltage I use HV diode modules. Regards, Larry N5BIP I need to replace a zener bias diode. I have a ton of 1N5408's. Any problems with using a string of 9
- /archives//html/Amps/2006-11/msg00086.html (6,693 bytes)
- 2. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: "Larry Carman" <lncarman@swbell.net>
- Date: Mon, 6 Nov 2006 14:00:15 -0600
- Hi Marv, Thanks for the info. I don't have any amps with a biasing need of over 40 volts. I'm really not sure of the IMDs and I don't have a spectrum analyzer to gather accurate info. The modules I u
- /archives//html/Amps/2006-11/msg00092.html (8,244 bytes)
- 3. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: "Tom W8JI" <w8ji@w8ji.com>
- Date: Mon, 6 Nov 2006 15:05:19 -0500
- Good question. I always wonder about the stability of forward biased diodes with current and temperature. Has anyone actually measured it?? 73 Tom _______________________________________________ Amp
- /archives//html/Amps/2006-11/msg00094.html (7,077 bytes)
- 4. [Amps] FW: Zener Bias Replacement (score: 1)
- Author: "Larry Carman" <lncarman@swbell.net>
- Date: Tue, 7 Nov 2006 15:32:15 -0600
- OK... you all have sold me on the idea of using zeners instead of standard diodes. At least by using standard diodes I have determined the bias voltage I need. Now I have to find a zener supplier tha
- /archives//html/Amps/2006-11/msg00109.html (9,648 bytes)
- 5. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: TexasRF@aol.com
- Date: Tue, 7 Nov 2006 16:46:39 EST
- Wonder if Frank, K2AW (Silicon Alley) still offers 50w zener diodes? He had quite good prices a few years ago when I needed some. 73, Gerald K5GW In a message dated 11/7/2006 3:33:12 P.M. Central Sta
- /archives//html/Amps/2006-11/msg00110.html (9,880 bytes)
- 6. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: "Bob Maser" <bmaser@tampabay.rr.com>
- Date: Tue, 7 Nov 2006 17:05:15 -0500
- Try K2AW in the back of QST. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
- /archives//html/Amps/2006-11/msg00111.html (10,907 bytes)
- 7. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: Steve Thompson <g8gsq@eltac.co.uk>
- Date: Tue, 07 Nov 2006 22:45:39 +0000
- How does a smaller diode with a big transistor fare (for example, see the very bottom of http://i5uxj-2.cln.it/amp/schemi/w6sai/w6sai.html) - or a big transistor with a TL431 as in the G3SEK 'triode
- /archives//html/Amps/2006-11/msg00112.html (7,797 bytes)
- 8. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: "Phil Clements" <philc@texascellnet.com>
- Date: Tue, 7 Nov 2006 17:05:37 -0600
- Go down to your local emporium and buy a 1N4741 Zener, a 2N3055 transistor, and a heat sink for the 3055. This will give you 12 volts at 50 watts +. If you need another voltage, just sub the 4741 fo
- /archives//html/Amps/2006-11/msg00113.html (8,598 bytes)
- 9. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
- Date: Tue, 7 Nov 2006 23:37:50 +0000
- Sorry, I'm pushed for time at the moment, and unable to reply in great detail. The circuit for a high-power 'adjustable zener' comes straight from the TL431 data sheet. Both WD7S and I have used it i
- /archives//html/Amps/2006-11/msg00114.html (9,366 bytes)
- 10. Re: [Amps] FW: Zener Bias Replacement (score: 1)
- Author: "k7rdx" <k7rdx@charter.net>
- Date: Tue, 7 Nov 2006 16:45:21 -0800
- K2AW Frank has excellent prices on 50 watt zeners...Also for those wanting an adjustible bias for the common ham triodes see: http://gs35b.com/bias/ Tony has developed this small board and the price
- /archives//html/Amps/2006-11/msg00117.html (10,330 bytes)
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