Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Papa Jim on February 21, 2019, 04:22:52 pm

Title: New Build Got Underway Today
Post by: Papa Jim on February 21, 2019, 04:22:52 pm

Off to a great start I think.  :smiley:

Pictures here to view.  http://www.tdpri.com/media/albums/5f2a-princeton-amp-build.2260/

AC Input....Check
Filament Voltage....Check
B+1....Check
B+2....Check
B+3....Check
B+4....Check
HV wiring to V1....Check
HV wiring to V2....Check
HV wiring to Output Tranny....Check
Output Tranny wired to 4/8 Ohm Selector Switch....Check
Selector Switch wire to Output Jack....Check

Title: Re: New Build Got Underway Today
Post by: Tbone55 on February 21, 2019, 04:38:37 pm

Your build looks really nice. It's a lot different than my Blues Jr. Your wiring is all on the chassis. Looks really neat and tidy.

Great job and great pictures. keep them coming.

Cheers!

Title: Re: New Build Got Underway Today
Post by: Papa Jim on February 21, 2019, 05:14:19 pm

Will do. There is only something like 15 more small resistors and caps to add and they are gonna be on the sockets and pots. Going for a really clean build. Just hope it is not noisy.

Title: Re: New Build Got Underway Today
Post by: Tbone55 on February 21, 2019, 08:16:42 pm

Well, I'm a newbie at this so I can't really give you any advice. Doug has excellent information in the library so I would certainly make sure that you read up on as much information on that amp that he has. It was worth its weight in gold for my build.

Title: Re: New Build Got Underway Today
Post by: Papa Jim on February 21, 2019, 08:31:26 pm

Yep, he has some awesome info accumulated for us. I consider myself not a newbie but definitely a rookie. All my builds so far have been good so keeping my fingers crossed. The help on here is very valuable and great to know it is so welcome.  :icon_biggrin:

Title: Re: New Build Got Underway Today
Post by: Papa Jim on February 23, 2019, 07:14:32 pm

Finished up the 5F2A Princeton Today. It sounds awesome for such a simple amp. Here's the pictures of the finished amp. Next thing will be to add a one tube reverb to it.
http://www.tdpri.com/media/albums/finished-5f2a.2261/

Title: Re: New Build Got Underway Today
Post by: jamaio on February 23, 2019, 08:04:41 pm

Your build looks great!!  What speaker are you using? 

I built the 5f1 two years ago and just upgraded my speaker to a Jensen C12Q8 and it sounds awesome.

Title: Re: New Build Got Underway Today
Post by: Papa Jim on February 23, 2019, 08:30:45 pm

Well I only have 2 speakers. A Jensen C10Q and a Celestion G12M Greenback. I have only played it so far with the Celestion but will try out Jensen also. I am planning on putting a bright switch in it next then the reverb.

Title: Re: New Build Got Underway Today
Post by: Tbone55 on February 23, 2019, 10:23:54 pm

Nice job! I have a Celestion Vintage G30 in my Blues Jr III. Great speaker. I just finished my Blues Jr conversion but ran into a problem on power up. Smoked a resistor. Went through some debugging and found a resistor that wasn't hooked up in the right place. I'll be replacing them and then try again. Hope for a better outcome.

Enjoy your amp!