[ARC5] Fw: ARC-5 AC Power Supply solutions

[J. Forster]

> I thought we are talking about a transformer with two separate 115v
> windings -- if so what's
> the real difference between this PS application and conventional power
> transformers having
> separate HV and filament windings - except that this unit may not have
> sufficient winding isolation if one 115V winding
> is being used to feed a FW rectifier

The only difference is tube plate & filament transformers are a lot less
common today than 50 years ago.

-- has anyone, at all, been
> suggesting
> rectifying directly
> from the ac line?

Yes.

-John

================

Actually all this is about as conventional and basic as
> you can get.
> I'd have discussed this with you off list but my mails still bounce unless
> I
> use one of
> my other email addresses.
>
> Henry
>
>
> ----- Original Message -----
> From: "J. Forster" <jfor at quik.com>
> To: "Henry Mei'l's" <meils at get2net.dk>
> Cc: <arc5 at mailman.qth.net>
> Sent: Tuesday, February 01, 2011 4:10 PM
> Subject: Re: [ARC5] Fw: ARC-5 AC Power Supply solutions
>
>
>> No. The cleverness of the post was using one 115 V primary winding as an
>> input, the other half as an isolated secondary (with a FW bridge). FW
>> rectified wit a C input filter will give you 160-180 V DC.
>>
>> The scheme isolates the DC from the AC. Rectifying the line w/o
>> isolation
>> is a VERY BAD idea, IMO.
>>
>> -John
>>
>> =============
>>
>>
>>> ----- Original Message -----
>>> From: "Henry Mei'l's" <meils at get2net.dk>
>>> To: <jfor at quik.com>
>>> Sent: Tuesday, February 01, 2011 4:04 PM
>>> Subject: Re: [ARC5] ARC-5 AC Power Supply solutions
>>>
>>>
>>>> John
>>>>
>>>> Wouldn't Jess be best off using the full winding either full-wave via
>>>> the
>>>> center tap or a diode bridge arrangement
>>>> across the full winding, DC output being fed to voltage-dividing load
>>>> resistors, thus using the full 115v winding?
>>>>
>>>> Winding isolation could easily be tested, by several methods.
>>>>
>>>> Henry
>>>>
>>>> ----- Original Message -----
>>>> From: "J. Forster" <jfor at quik.com>
>>>> To: "David Stinson" <arc5 at ix.netcom.com>
>>>> Cc: <arc5 at mailman.qth.net>
>>>> Sent: Tuesday, February 01, 2011 3:51 PM
>>>> Subject: Re: [ARC5] ARC-5 AC Power Supply solutions
>>>>
>>>>
>>>>> Another consideration is isolation between halves of the primary. It
>>>>> might
>>>>> not be all that good.
>>>>>
>>>>> -John
>>>>>
>>>>> ===============
>>>>>
>>>>>
>>>>>>
>>>>>> ----- Original Message -----
>>>>>> From: "Jess Lewis" <kr4oj at bellsouth.net>
>>>>>> Subject: [ARC5] ARC-5 AC Power Supply solutions
>>>>>>
>>>>>>>Not sure it is OK to post this sort of info here, but they have 3
>>>>>>>left...
>>>>>>>E-Bay sale # 110638420067
>>>>>>
>>>>>> Perfectly OK, Jess, and very helpful.
>>>>>> Thanks for the pointer!
>>>>>> 73 Dave S.
>>>>>>
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>>>>>
>>>>>
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>
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