Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on March 06, 2020, 03:41:23 am

Title: VHT Cathode Switch - is this rotary switch draw correctly ?
Post by: kagliostro on March 06, 2020, 03:41:23 am

The VHT Special 6 Ultra uses a rotary switch to swap cathode bypass capacitors on the Power Tube

the schematic is drawn (to me) in an odd way

(https://i.imgur.com/mvJqLKC.jpg)

Is this correctly draw ? (despite the fact there are only 6 positions instead of 11)

(https://i.imgur.com/USKBxQe.jpg)

Thanks

Franco

Title: Re: VHT Cathode Switch - is this rotary switch draw correctly ?
Post by: d95err on March 06, 2020, 05:10:32 am

A rotary switch can be seen as a series of separate single-pole switches which are tied together at one end. At least if you add the constraint that only one at a time can be closed.

So, I'd say both drawings are functionally equivalent. IMHO, the second drawing is more intuitive, easier to understand and closer to the physical contruction of the rotary switch.

Title: Re: VHT Cathode Switch - is this rotary switch draw correctly ?
Post by: kagliostro on March 06, 2020, 05:15:46 am

Ciao D95err

Quote

So, I'd say both drawings are functionally equivalent.

That is what I was wondering

Thanks

Franco