tweed princeton volume pot

stingray_65 · 03-19-2009, 10:32 PM

Hey all,

I just bought a Mercury Magnetics Tone Clone FTPP-55 power tansformer off EBay for $55

for some reason ( haste or wishful thing) I thought I was buying a 5E3 tranny.

So what the heck I'll build a princeton! I've darn near everything else on my bench to build one including a genuine Fender speaker baffle with a 10" ceramic speaker.. logo and everything

the Fender layout I found states the Volume pot is linear.

I find this odd.

Should I use an audio taper for the volume instead?

I'm not trying to build a perfect clone, just a good playing amp.

If I can use a 1Ma pot, I have a CTS here with a push pull DPST switch.

what would be a useful feature to make out of this? maybe a bright switch or cut?

Thanks
Ray

****EDIT*****

I'll build the 5F2A circuit, no choke.
this being a Tone Clone will i end up needing to adjust the HV?

tubeswell · 03-20-2009, 09:47 AM

Audio taper will work better as a volume pot

Just build it as per the schematic, it won't matter if the plate voltage is 20V higher than the schematic

PremiumPlus · 05-01-2009, 05:47 PM

You're going to love your 5F2A. It's a great amplifier. I've got an original 1960 tweed with cigarette burns all over it! And funny thing, a cheap little Jensen MOD 8" sounds better than an $80 alnico in there.

03-19-2009, 10:32 PM	#1
stingray_65 Senior Member Join Date: Sep 2008 Posts: 214	tweed princeton volume pot Hey all, I just bought a Mercury Magnetics Tone Clone FTPP-55 power tansformer off EBay for $55 for some reason ( haste or wishful thing) I thought I was buying a 5E3 tranny. So what the heck I'll build a princeton! I've darn near everything else on my bench to build one including a genuine Fender speaker baffle with a 10" ceramic speaker.. logo and everything the Fender layout I found states the Volume pot is linear. I find this odd. Should I use an audio taper for the volume instead? I'm not trying to build a perfect clone, just a good playing amp. If I can use a 1Ma pot, I have a CTS here with a push pull DPST switch. what would be a useful feature to make out of this? maybe a bright switch or cut? Thanks Ray **EDIT*** I'll build the 5F2A circuit, no choke. this being a Tone Clone will i end up needing to adjust the HV? Last edited by stingray_65; 03-19-2009 at 10:42 PM.

03-20-2009, 09:47 AM	#2
tubeswell Supporting Member Join Date: Feb 2007 Location: Wellington NZ Posts: 2,662	Audio taper will work better as a volume pot Just build it as per the schematic, it won't matter if the plate voltage is 20V higher than the schematic __________________ Building a better world (one tube amp at a time)

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05-01-2009, 05:47 PM	#3
PremiumPlus Member Join Date: Aug 2007 Posts: 65	You're going to love your 5F2A. It's a great amplifier. I've got an original 1960 tweed with cigarette burns all over it! And funny thing, a cheap little Jensen MOD 8" sounds better than an $80 alnico in there.

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