[Collins] Regulating the 140 vdc supply line....correction75S3receiver

[Carl]

Some IC regulators are quite noisy and require attention to bypassing. 
Having a scope available to look at the various voltages is a big help.

Carl
KM1H



----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at storm.weather.net>
To: <collins at mailman.qth.net>
Sent: Wednesday, October 22, 2008 12:31 PM
Subject: RE: [Collins] Regulating the 140 vdc supply 
line....correction75S3receiver


> On Wed, 2008-10-22 at 10:34 -0400, Bob Spooner wrote:
>> Smith,
>>
>> If you do regulate the supply line, I would suggest using an 
>> integrated
>> circuit regulator rather than a zener diode circuit. IC regulators 
>> are more
>> efficient, and that would be easier on the power supply.
>>
>> 73,
>> Bob AD3K
>
> Series regulators can be more efficient, but shunt IC regulators are
> easier to wire in and while they will regulate better, the power
> dissipation is still there.
> -- 
> 73, Jerry, K0CQ, Technical Advisor to the CRA
> All content copyright Dr. Gerald N. Johnson, electrical engineer
>
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