This is from my thread on TDPRI which can be found here if you’d like to see this in its entirety: Click Me!
Most of this is copied and pasted from there because it was already so detailed and accurate to what is being used. My memory isn’t as good as the Internet’s is!
Mainly this was my first venture into modding audio circuits besides build BYOC kits and selling them. Working with an amplifier is amazing! Hearing the differences you can make is very rewarding.
Correction: BillM IS
no longer providing these mods again after he took a break due to health concerns. For a while his son was filling the orders, but on their site it sounds like Bill is back!
Story posted on BillM’s site announcing he is back and working on a backlog of orders:
Without anymore delay, here is the Fender Blues Jr tube amplifier (except for the rectifier and reverb)!
I purchased the Blues Junior knowing it was pretty much the perfect practice/home amp in the sub $500 range for the classic American tone. After spending some time with it and stumbling through the internet onto BillM’s website (http://billmaudio.com/wp/) I decided to start modding the amp. I have a long history of modding PC’s (even directly soldering on motherboards and video cards along with building custom guitar effects pedals. So I knew this would be a piece of cake with how simple the Blues Jr. is.
I started with some basic BillM mods, in the end this was the list of mods I had purchased/installed from BillM:
- Basic Cream Kit
- Sparkle Mod
- Presence Mod
- Switchcraft Input Jack
- Switchcraft Line Out Jack
- Standby Switch
- TO20B Upgraded Output Transformer
After installing all of those mods I was very satisfied with what I had in terms of overall tone and the amount of tonal possibilities with all the mods. The only thing still lacking was the bass response from the stock speaker.
At that moment in time the “budget” wasn’t the main concern here and you are talking about a $200 speaker upgrade (that could be moved or sold at very little loss).
Here is a breakdown of everything you see in the completed pictures
Blues Jr. – $429
NOS Tubes – $105
BillM Mods – $91
Speaker – $199
Total – $824
I went with the G12H because I have heard them (lol ever listened to Hendrix? ) versus some other 12″ speakers and nothing came close to it in my mind (from what I’ve heard in person). Looking back now I wish I had gotten a used Blues Jr. (since I was going to void the warranty anyway), but you live and learn.
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