Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: hesamadman on July 30, 2016, 07:48:09 pm

Title: Physically smaller pots?
Post by: hesamadman on July 30, 2016, 07:48:09 pm

I've been converting my 30 watt design to two channel for some time now. One thing that I think would benefit my layout is if I could replace the gain and master pot (1m) to a smaller pot. Does anyone know where I can get smaller sized pots?

Title: Re: Physically smaller pots?
Post by: kagliostro on July 31, 2016, 05:56:15 am

Smaller sized .... do you mean 16mm pots ?

usually guys try to use 24mm pots instead of smaller ones

Have you space problems ?

In which side of the pond are you ? (USA - Europe - Australia ....)

http://www.tubes.it/alpha_main_ita.htm (http://www.tubes.it/alpha_main_ita.htm)

http://www.tube-town.net/ttstore/Potentiometer:::50.html (http://www.tube-town.net/ttstore/Potentiometer:::50.html)

Franco

Title: Re: Physically smaller pots?
Post by: hesamadman on July 31, 2016, 06:34:43 am

Thanks K. Yes 16 mm looks perfect. Only values I would need are 1m and maybe 500k. Looks like those are easily accessible. I am having a slight space issue on my two channel.

Title: Re: Physically smaller pots?
Post by: mresistor on July 31, 2016, 10:09:18 am

K - those split shaft alpha 16mm in your second link are probably for guitars. These are the ones he wants. 1/4 shaft and 500V rating.
http://www.pedalpartsplus.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=PPP&Category_Code=Pot16 (http://www.pedalpartsplus.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=PPP&Category_Code=Pot16)


well I see they may have the same rating - just different style shafts... 

Title: Re: Physically smaller pots?
Post by: hesamadman on July 31, 2016, 10:16:36 am

Thanks MRESISTOR, I just ordered a few from your link.

Title: Re: Physically smaller pots?
Post by: PRR on July 31, 2016, 10:34:23 am

Often the knob and fingers limit how close we can space pots.

I do remember a discrete sequencer with 4*10 knobs in about 2"*4", but it was very hard to twiddle.

Title: Re: Physically smaller pots?
Post by: hesamadman on July 31, 2016, 12:15:46 pm

I already have the pots installed and spaced well. But internally i have them sideways because the gain and master are laid out vertically rather than side by side. I would have a little bit of cleaner wiring if I didn't have to have the pots sideways.

Title: Re: Physically smaller pots?
Post by: HotBluePlates on July 31, 2016, 12:44:16 pm

Nothing wrong with mounting the pots sideways... Once the wiring is done and the amp is buttoned up, no one sees them.

Title: Re: Physically smaller pots?
Post by: kagliostro on July 31, 2016, 02:26:43 pm

+1 for HotBluePlates

Franco

Title: Re: Physically smaller pots?
Post by: hesamadman on August 02, 2016, 07:38:18 am

Though not necessarily a huge issue, a smaller pot would just make everything a little easier. I have channel one on left and channel 2 on right. I also have LED indicators that illuminate on each channel separately. Heres my faceplate layout:


BASS- MID- TREBLE- (GAIN/MV stacked vertically) - <--LED-- Switch--- LED --> (GAIN/MV stacked vertically)- TREBLE- MID- Bass


The second channel is laid out as a mirrored image of the first. The LED's are a bit close to the (GAIN/MV stacked vertically) pots. If I had smaller pots, I could make this work a little cleaner.


Is there any difference in the function of these 16mm pots?

Title: Re: Physically smaller pots?
Post by: sluckey on August 02, 2016, 07:45:10 am

no