Well Bob, since you just violated the cardinal rule of email etiquette
I might say similar about you.
OTOH, if you had simply asked me privately who the person was I would
have told you.
Since you feel the obsessive need to grandstand by posting a private
email to the list Ive little more to say.
Carl
KM1H
----- Original Message -----
From: "Bob Maser" <bmaser@tampabay.rr.com>
To: "AMPS" <amps@contesting.com>; "Carl" <km1h@jeremy.mv.com>
Sent: Friday, May 15, 2009 10:57 PM
Subject: Re: [Amps] filament transformers
> Carl, I'm beginning to think that everything I've read about you on
> the reflector is true. You make a derogatory comment about W4LNI and
> now you say "leave me out of it". Give me a break.
>
> Bob W6TR
> ----- Original Message -----
> From: "Carl" <km1h@jeremy.mv.com>
> To: "Bob Maser" <bmaser@tampabay.rr.com>
> Sent: Friday, May 15, 2009 10:53 PM
> Subject: Re: [Amps] filament transformers
>
>
>> Leave me out of the middle, its not my problem
>>
>> I dont know your friend.
>>
>> Carl
>>
>>
>> ----- Original Message -----
>> From: "Bob Maser" <bmaser@tampabay.rr.com>
>> To: "Carl" <km1h@jeremy.mv.com>
>> Sent: Friday, May 15, 2009 10:42 PM
>> Subject: Re: [Amps] filament transformers
>>
>>
>>> Your friend was not telling you the truth. Jim is very reliable and
>>> a straight shooter. One time he built a filament transformer for a
>>> 3CX1200D7 for me and the transformer delivered slightly higher
>>> voltage than I wanted. No questions asked, he built me another for
>>> no additional charge and added extra primary taps. I'll forward you
>>> e mail to him for his info.
>>> Bob
>>> ----- Original Message -----
>>> From: "Carl" <km1h@jeremy.mv.com>
>>> To: "Bob Maser" <bmaser@tampabay.rr.com>; "Paul Decker"
>>> <kg7hf@comcast.net>; <amps@contesting.com>
>>> Sent: Friday, May 15, 2009 10:20 PM
>>> Subject: Re: [Amps] filament transformers
>>>
>>>
>>>>A friend recently got stiffed from that source for an 8877 filament
>>>>xfmr, it was almost $100. He didnt think to check out the $33
>>>>Hammond.
>>>>
>>>> Carl
>>>> KM1H
>>>>
>>>>
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: "Bob Maser" <bmaser@tampabay.rr.com>
>>>> To: "Carl" <km1h@jeremy.mv.com>; "Paul Decker" <kg7hf@comcast.net>;
>>>> <amps@contesting.com>
>>>> Sent: Friday, May 15, 2009 7:36 PM
>>>> Subject: Re: [Amps] filament transformers
>>>>
>>>>
>>>>> Waste money on a custom filament transformer? I'm not talking
>>>>> about a $100 transformer, maybe $35. If you can't afford that
>>>>> maybe you shouldn't be building homebrew amps.
>>>>>
>>>>> Bob W6TR
>>>>> ----- Original Message -----
>>>>> From: "Carl" <km1h@jeremy.mv.com>
>>>>> To: "Paul Decker" <kg7hf@comcast.net>; <amps@contesting.com>
>>>>> Sent: Friday, May 15, 2009 6:58 PM
>>>>> Subject: Re: [Amps] filament transformers
>>>>>
>>>>>
>>>>>> Get the 3A version and measure the voltage at the socket. If its
>>>>>> high
>>>>>> (which it should be) wind some wire on a small ferrite rod which
>>>>>> can
>>>>>> also double as a filament choke. When you go to the 2nd tube use
>>>>>> heavier
>>>>>> wire on the rod or none depending on the voltage. It never hurts
>>>>>> to go
>>>>>> slightly lower than the median spec. The transformer will only
>>>>>> give 14V
>>>>>> at its 3A rating and it will be a bit higher at 1.5A
>>>>>>
>>>>>> Dont waste money on an overpriced custom transformer in this
>>>>>> instance. I
>>>>>> dont see the necessity for a rheostat either for such a small
>>>>>> drop.
>>>>>>
>>>>>> Carl
>>>>>> KM1H
>>>>>>
>>>>>>
>>>>>>
>>>>>> ----- Original Message -----
>>>>>> From: "Paul Decker" <kg7hf@comcast.net>
>>>>>> To: <amps@contesting.com>
>>>>>> Sent: Friday, May 15, 2009 4:40 PM
>>>>>> Subject: [Amps] filament transformers
>>>>>>
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Hello builders,
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> My amp continues to grow. I'm trying to pick out a filament
>>>>>>> transformer, such and easy task.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> The amp is based on a 3cx800a7 which requires 13.5V +- 0.6V at
>>>>>>> 1.5A. I
>>>>>>> was thinking that a 14V transformer would work great. Ideally, I
>>>>>>> would
>>>>>>> like to build the amp with the option to eventually be expanded
>>>>>>> to a
>>>>>>> pair of 3cx800's rather than the single. This would mean I need
>>>>>>> 3.0A
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On digikey , they have a 14V 3.0A transformer
>>>>>>>
>>>>>>> http ://search. digikey .com/scripts/ DkSearch / dksus . dll
>>>>>>> ?Detail&name=237-1279-ND
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> and a 14V 4.0A transformer
>>>>>>>
>>>>>>> http ://search. digikey .com/scripts/ DkSearch / dksus . dll
>>>>>>> ?Detail&name=237-1094-ND
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> So my questions are: Is it acceptable to use the higher current
>>>>>>> rating
>>>>>>> in the single tube version of the amp? Would current inrush be
>>>>>>> an
>>>>>>> issue? Is the 3A version enough, should I get the 4A version or
>>>>>>> something even larger? Or, is there something else I should be
>>>>>>> thinking about using?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> thanks,
>>>>>>>
>>>>>>> Paul, kg7hf
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Amps mailing list
>>>>>>> Amps@contesting.com
>>>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Amps mailing list
>>>>>> Amps@contesting.com
>>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>>
>>>>
>>>
>>
>
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