Page 1 of 1

Roll your own?

PostPosted: Mon Nov 04, 2019 12:22 pm
by fatcat
I'm contemplating assembling a kit amplifier and am open to suggestions and comments.
A couple of ones that have caught my eye are 5E3s and Princeton Reverbs.
I've never built one, but have done work on my Bassmans and Showmans.

Re: Roll your own?

PostPosted: Mon Nov 04, 2019 2:59 pm
by jps
fatcat wrote:...5E3s and Princeton Reverbs

Two very different sounding amps. What are you seeking, tonally?

Re: Roll your own?

PostPosted: Mon Nov 11, 2019 1:45 am
by soundmasterg
You can build a kit with some moderate prior experience with working on tube amps. The main thing is safety of course. These have voltages in them that can kill you if you aren't careful, and given the time a kit takes to make, your construction of it will likely not be done in all one go. So you need to make sure you double and triple check all connections, especially the power supply. It is also very useful to bring an amp up for the first time on a variac with a light bulb current limiter in case of problems with your build.

All kits are not created equally. The Weber kits are the cheapest price-wise for the most part, but the assumption is made that you know what you are doing and there are no instructions. Some of the hardware is cheap and you can upgrade with good quality stuff and get a better amp. For 5E3's the Mission Amp kits are probably a better choice though unless price is your main consideration. The Mission amp kits come with instructions and are well done. You could also consider a Mojo kit...they seem to be pretty well done.

The Princeton seems similar to the other amps you mentioned that you have worked on already. The 5E3 would give you different sound. I own a 1956 5E3 and if given a choice between that and a Princeton Reverb, I'd choose the 5E3 myself. The tweed style chassis are a bit harder to work on than the blackface style amps but either one is likely a good project. You might want to build a little Champ style amp first though as it is simpler. As with all tube amps grounding and proper soldering and wire routing are very important. If you go with the random chassis grounding of the vintage amps, it will likely work similar to vintage amps, but if you take a little time to improve the grounding you will get better performance with different grounding systems such as Kevin O' Connor's Galactic Ground system.


Re: Roll your own?

PostPosted: Tue Nov 12, 2019 12:37 pm
by fatcat
Thanks for the good advice.
Weber's lower costs dissipate if more is to be spent on better components, but it's also hard to justify a C note or so for a set of destructions. That being said, it could be considered as insurance.
If I get my feet wet with a Champ, it'd probably be a Weber. I've assembled 2 load/line attenuator kits from them, without instructions.
Mission's limited offerings look good, but ordering would seem to be difficult.
Mojotone would probably be a first choice, and has the options of ordering direct or
Stewmac has offerings, but those look like Mojotones with a huge markup They're out of the running.

Prop tax bill arrived with a huge increase :x so the project's been put on back burner for this year.

Re: Roll your own?

PostPosted: Fri Feb 21, 2020 6:29 pm
by fatcat
I decided on a 5E3 from Ted Weber, as they had a Christmas sale on, with a discounted price.
Stated lead time for kits is approximately 2-3 weeks mine shipped one day under 3 weeks.
It was short 3 critical parts, I notified them and they promised to send them right away.
Somebody dropped the ball, they hadn't arrived in a month, so I bitched, and they apologized and sent them the next day.
By following the layout diagram available on line, and being very careful and checking and rechecking I ended up with a nifty l'il amp.
It powered up clean, with no sparks ,smoke or hums. I'll play with it for a while, then probably try to sell it.

Princeton Reverb's next, but not right away. Weber's TOS on them.

Re: Roll your own?

PostPosted: Fri Feb 21, 2020 8:32 pm
by jps
If you get a Princeton Reverb Amp, put a good 12" speaker in it. Mine had a Celestion G12M-70 put in it back in the '70s (long before I owned it). Great little amp.

Re: Roll your own?

PostPosted: Fri Feb 21, 2020 9:34 pm
by fatcat
I've a couple of British Vintage 30s gathering dust that might be in consideration