| To: | <amps@contesting.com> |
|---|---|
| Subject: | [AMPS] sb 220 update that was bounced the first time sent in... |
| From: | G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK) |
| Date: | Thu, 11 Nov 1999 11:23:58 +0000 |
Rich Measures wrote:
>
>>I'd like to protect the movements if possible.
>
>A meter/shunt protection circuit is at Figure 2 on my Web site.
>
Highly recommended - together with the surge limiting resistor ("glitch
resistor") in the HV supply, between point J and the shorting switch.
To protect your valuable meters, invest in large diodes such as 1N5408
or GI750 - not weedy little 1N400x which may burn out in a surge.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
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