[Amps] What to do about 'Neutral' in HB amp?

[Steve Bookout]

GA Vic,

In my mind, that was the whole point; not to take anything to gnd.  I 
was going to treat one side of the secondary as the '120 v source' and 
the other as the '120 neutral' (that I never had).

Thanks  for the CWT contacts.

Steve, NR4M

On 12/31/2022 12:46 AM, Victor Rosenthal wrote:
> Steve,
>
> Keep in mind that most of the step up/down transformers sold are 
> actually autotransformers. One side of the primary is connected to one 
> side of the secondary. This should not be a problem regarding 
> operating your 120v stuff, but don't ground either side of the secondary.
>
> 73,
> Victor, 4X6GP
> Rehovot, Israel
> formerly K2VCO
> CWops no. 5
> http://www.qsl.net/k2vco/
>
> On 31/12/2022 1:25, Steve Bookout wrote:
>> Hello all,
>>
>> My question was not intended to start a 'smartest man in the room' 
>> debate.  I just had a genuine question.  Electronics is my hobby and 
>> never was my profession, so I can't get into the 'Grey matter debates'.
>>
>> I did get several good responses to my original question and have 
>> decided on a course of action.   This amp is being built with parts 
>> gathered, here and there, over 4 decades, so not much is 'ideal'.
>>
>> My several blowers are all 120 volt.
>>
>> I do not have a 120/240 volt filament I can use to use the dual input 
>> windings center tap as a neutral.
>>
>> I have ordered a 500 watt 240>120 step down transformer.  I will have 
>> one side feeding my 120 volt items and the other side as a common 
>> neutral.
>>
>> My DC power supply has an input of 88 to 264 volts, so that is not a 
>> problem.  Just a couple of relays, filament transformer and blower.
>>
>> I have room for the transformer as I'm building this 8877 10 meter 
>> amp in a waist high rack cabinet.
>>
>> I'm sure it will work out fine.  If it doesn't, I just tie the 
>> 'downstream side' of the 120 volt item to the chassis and not tell 
>> anyone. 8^)
>>
>> When I kick your butts in some contest on 10 meters, it might be with 
>> an amp with the neutral tied to the chassis 8^)
>>
>> Seriously, thanks for the useful input.
>>
>> 73 de Steve,  NR4M
>>
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