[Amps] Why a voltage doubler ?

[Paul Baldock]

Doesn't a full wave bridge give you better regulation as all 
capacitors are charged on both halves of the AC waveform, where as 
with a voltage doubler the capacitors are only charged on half the 
waveform (half on the positive and half on the negative)?

- Paul



At 03:55 PM 5/13/2017, Carl wrote:
>The doubler had been used by hams since the 30's but made it into 
>prime time with QST articles aimed at the Novice and other money 
>challenged hams.
>
>National and Collins were early users and within a few years almost 
>everyone was doing it.
>
>Ameritron still lives in the last century.
>
>Carl
>
>
>----- Original Message ----- From: "Richard Solomon" <dickw1ksz at gmail.com>
>To: "amps" <amps at contesting.com>
>Sent: Saturday, May 13, 2017 5:09 PM
>Subject: Re: [Amps] Why a voltage doubler ?
>
>
>>Actually, the Yankee Skinflint in me likes
>>to think it had more to do with economics.
>>
>>Copper wire and winding time is expensive.
>>
>>73, Dick, W1KSZ
>>
>>On Sat, May 13, 2017 at 2:00 PM, Ron Youvan <ka4inm at gmail.com> wrote:
>>
>>>     Paul Baldock wrote:
>>>
>>>Why did early amplifiers use voltage doublers rather than twice the
>>>>secondary turns and a full wave bridge?
>>>
>>>   I think it is for two reasons, to control the impedance of the power
>>>supply and to limit the fault current, if there is an arc.  (anywhere)
>>>Then on rebuilds cheapskate HAMs double the value of the capacitors and
>>>increase the fault current.
>>>
>>>   Making the plate supply overly robust (and low impedance) increases the
>>>chances of a fault damaging things, if the supply caves in, hard damage is
>>>minimized.
>>>The SB-220 plate power supply was the perfect design for two 3-500s
>>>throttled back to 1,000 input watts.  (then the limit)
>>>--
>>>   Ron  KA4INM - Youvan's corollary:
>>>                 Every action results in unwanted side effects.
>>>_______________________________________________
>>>Amps mailing list
>>>Amps at contesting.com
>>>http://lists.contesting.com/mailman/listinfo/amps
>>_______________________________________________
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>
>
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