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

[Bob Macklin]

But both Mouser and Allied do have some tube plate and filament 
transformers. You just have to know where to look for them.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- 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 8:29 AM
Subject: Re: [ARC5] Fw: ARC-5 AC Power Supply solutions


>> 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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