My Fender Pro Reverb Amp's Rebirth

I have an old fender silverface pro reverb.  It's a non master volume model.  I loved the amp when I first got it several years ago.  Such great reverb, loud enough to stay clean with my hard hitting drummer at the time.  As time goes on we always find things that we don't like or things that need improvement.  I had done the blackface mod to the amp a while back, and while that was a huge improvement, I decided that I needed more.  I mean I have two channels, one of which NEVER got used.  There really isnt much point to having two identical amp channels that are out of phase with each other, especially when the normal channel doesnt have reverb.  I decided I wanted to make one channel different, and keep one the same.  I am in the process of putting reverb and tremolo on both channels.  I made the currrent reverb channel my modded channel and kept the normal channel mostly the same.  I also completely overhauled the amp- So far I have...

1.) replaced all the coupling caps and tone caps with Orange Drop 225 Polyester film caps- these are kind of like the mallory 150m's, different than the overly harsh orange drop 715's.  The coupling caps drift over time and my fender didnt have the revered "blue molded" caps... they are blue though.  This made a ridiculously huge improvement in the response and clarity of my amp.  This alone made the breakup sound much better

2.) I then took a cue from jerry garcia's modified twin reverb preamp that he used over the years and replaced all of the cathode bypass capacitors and resistors in parallel with them to some NOS sprague 150d Tanatulum caps, I used PRP modern american made military spec metal film resistors in paralell.  This really changed the 'quickness' of the amp, sounds like I have less "sag".  It's more responsive and touch sensitive with these caps.  I think they may be adding noise though (the parts experiments are not done though- These are all my first choices) I also have a solid state rectifier to replace the tube rectifier in the pro reverb on the way.

3.) replaced all plate resistors with PRP metal film resistors- these are high quality low noise resistors, made for audio.  These really brought down the noise in the amp.  really bumped up the clarity in doing so.  These really do sound different from the carbon comps.  More HiFI, brighter maybe, cleaner, but not sterile at all.  These resistors are the modern version of the Dale rn65 or RN70 series.  Non inductive, non magnetic, and super precise.

4.) the values of the tone caps- I changed bass cap to .022uf and the mid cap to .022uf and the treble cap to a sivler mica 390pf.  This is for the lead  channel- it really brought up the mids in the normally bass and treble heavy fender amp.  I also increased the plate resistors using takman hi fidelity carbon film resistors.  audiophile stuff.  this increase to 150k caused a nice gain increase in that channel.  it starts to break up around 5 on the dial- where as it used to be about 7-8.  Very nice sounding.  the takman carbon films warmed up the overdrive instead of the metal film PRP's

5.) Changed grid resistors on power tubes to 2 watt non flammable ones.

6.) the pro doesnt have a mid range knob- I am in the process of adding one

7.) also adding a negative feedback knob... this will allow the amp to go from stock to sounding much meaner and aggressive.

8.) new reverb tank- reverb tanks wear out- mine just stopped sounding good, got noisier and metallic sounding.  I tried messing with the reverb circuit components, and it helped, but not enough.  The new accutronics tank sounds absolutely amazing!  classic fender

I am also waiting on parts to change out the filter caps.  And I may end up putting some nicer heyboer transformers in the amp eventually.  Some other easy modifcations included using 12ax7 tube in the phase inverter position and a 12at7 in v1 of my preamp.  This gives the amp more power tube gain and saturation and less preamp breakup.  The 12at7 sounds bettter when breaking up too.  Fender amps are not made for preamp distortion so I really try to keep that down.  I did a number of component value changes that minorly tweak the amp here and there.  It's a lot like cooking. You dont wanna go in there and use a ton of one ingredient- a little dash of lime to even out the sugar, a little salt to bring it out, but not too much.  Everyday I am changing values of parts- trying different types of parts- different material compositions.  trying to tune this amp perfectly to my dream amp.  I will be adding external bias testing points.  Maybe add tone and dwell knobs for my reverb.  I'm even contemplating adding a tube effects loop.  These silverface pro reverbs can still be had for realtively inexpensive prices.  I bought mine for $700- thats $700 for a 45 watt, hand wired, 2x12 tube amp that will last longer than you will!  Put a little elbow grease in them, and you have a boutique amp for under a grand!  Really amazing what you can do with these things.  You can even really get them to distort heavily- I may try a "Mesa Mark IIc" mod for the normal channel I've found by another fellow experimenter.  These ideas are just the tip of the iceberg, I havent even gotten into adding a tone stack bypass, or extra tube gain stages.  I think going too far has its problems- the best way is to do minor tasteful tweaks, using high quality parts, and you can get these things sounding better than the best blackface amps. I'll post soundclips soon!

Orange Drops (big orange things) PRP resistors (small red tubular things) NOS sprague 150d caps (silver tubulars) and silver mica cap (the little brown thing) Having new quality parts really brings the amp back to spec.  how it was meant to sound before all those old components got dried up, burnt out and out of tolerance.  it's crazy how good I can now make these amps sound!

Zen Drive Clone - this is one amazing sounding circuit.
I built it to see what the fuss was about...
And wow!  I have their tube version of the pedal on order.  This pedal even makes my
little practice amp sound like its a finely tuned Class A tube circuit running HOT!
This is a very original design (unlike so many modern boutique pedals on the market)
Very cool circuits from Hermida Audio!

Ampeg Scrambler Clone- a super rare pedal- probably because it's a merchant
of death.  This thing will rip your face off.  Cuts through the mix with its
piercing octave ring mod mix.  Or delivers a nasty bright crunch.
built this with the original old school 2n5306 transistors (nescessary to use these actually)
 and  I used the NOS 1n456 diodes. 

Classic Tremolo Circuit- EA tremolo- Rate, Depth, and Level Controls.
You can actually get a lot of boost out of this.  If you turn down
the tremolo and turn up the level this thing makes
a great sounding boost/buffer!

Modified Ross Compressor Clone- Very similar to the Keeley Compressor.  Top notch

Great bass response and high end clarity.  3 way switch for different attack speeds.

Slow speed gets an insane amount of sustain for the epic David Gilmour solods

Fast is reactive and squishy, but doesnt take away the spank on your

lightning fast chick'n pick'n riffs

Custom One Knob Silicon Fuzz Face
BC109 and BC108 transistors
 (can be built into teeny tiny 1590a enclosure, but
 this customer wanted ability to use a battery)

Group Shot (Clockwise from top middle)
EA Trem -I put a level control on this pedal, because it has a
great sounding buffer, sometimes I use this trem as a boost into my amp
Analog Octave Pedal (Clean- Oct Up- Oct Down- -2 Oct Down...Madbeanpedals.com PCB) -
 the Electro Harmonix POG is digital, fyi, and doesnt hold a candle compared to this
Demeter Mid boost/fat control Clone (Madbean PCB- thanks! super sick pedal)- amazing for pushing blackface/SF fenders

Here are some examples of pedals I've built (these are ones I currently have... I've built dozens and dozens more)  I usually build people pedals aren't easily available anymore (and that includes ones that arent the same as they used to be... ehm ehm... fuzz face, boss pedals, ibanez, anything vintage, and anything terribly overpriced) But I really can do just about anything.  I really dig the simple modern vintage style I've got goin here, but I can do custom graphics (I'm just perfecting the art currently- who knew I'd have to learn a graphics program to build pedals?)  Basically I'll be able to offer your choice of graphics on a pedal... Have a cool image, photo, gif, screen print, sports logo, Masonic Lodge Emblem... you want on a pedal?  I'll print it onto an overhead transparency, slap it on the pedal and coat it with clear coat.  How do I remember what these all these unlabeled knobs do?  Some only use one setting, and the others I love so much I could never forget!  I can use whatever color enclosure you want and your choice of knobs

Hello my name is Clay.  I am starting this blog to try to promote my long time hobby of building and modding pedals.  I started doing work for friends a couple years ago, and after much compliments, asking for more, suggestive innuendo, and direct demands.  I have begun offering my service to the public and with much success.  I am opening this blog to spread the word even further and allow people to check out some of my work.

I do low priced work for the musician.  I care about your sound and I love spending tons of time finding out exactly what people want to do with their rigs.  I do a number of things for guitarists and other electric or acoustic string players...
*Build custom effects pedals, clones of vintage and modern boutique pedals, you pick the colors, graphics, knobs, switches to add, knobs to add or subtract, more bass, less bass- anything you want.
There is really no limit to what I can build.  I don't build some stuff based on principals.  I really like building unique twists on classic vintage pedals (Like fuzz faces with extra controls, rangemasters with treble/high mid/mid/low mid boosts , or stuff that is discontinued and/or outrageously priced, I have no respect for some of these companies that think they can slap a $300 price tag on an overdrive pedal.  These companies don't even use the quality of parts that I use in most cases.  They don't have near the costs or labor that I have, and still demand ridiculous profit margins.  I don't get it. 
*I modify effects pedals- I can do custom mods, many of the "famous" guys mods, and we can even create your own special mod.  This includes upgrading components (pimping your cheap pedal), changing the eq, clipping section, adding switches, making the pedal better useable for different instruments like synth and bass or using pedals in a mixer. 
*I love working on guitars- I do
---Fretwork- Complete-professional fret leveling, crowning and polishing- this with a complete setup is the single best thing you can do to a guitar- even new fender americans and other nice guitars- to improve playability.  having properly leveled and crowned frets with greatly improve intonation- you can put your action as high or low as you want- I also polish the frets to a mirror finish.  its like bending on glass frets.  I can make mexican fenders easily outplay their american counterparts.  I make americans play better.  I use professional tools that I paid a lot of money for.  Do not believe in those ebay fret leveling kit scams.  There is some serious time, measurement, and efforts that go into this.  I have some guitars that I have worked on at my shop that you can play to check out the benefits.  If you're having any buzzing on any frets, want lower action, better intonation, or just a guitar that plays like the frets are made out of glass, come to me.  I will even re-polish your frets for you every couple months for next to nothing, or I can teach you how to maintain the polish yourself!
--- Setups- complete- using proper technique- saddle to fretboard radius matching- nut height to first fret- pickup height- truss rod adjustments- tremolo adjustments- I can make your guitar play better than new.
--- Electronic mods and installs (pickups, pots, switching mods etc)
--- I do a killer strat setup- I can install new bridges, make your floating strat trem stay in tune, install new nuts, adjust old ones, everyithing you can think of.
--- I can do a lot of stuff, but my luthier work is somewhat limited from major renovations such as acoustic neck resets and other expensive acoustic work- at this point at least
*I also work on amps.  Everything from repairs to modifications to tube bias adjustments for very reasonable prices.  The best price in town guaranteed, and work done by a guy that actually gives a shit about YOU and what YOU want.  I do...

---Cap jobs, component upgrades, tube installs and bias (I can even let you demo some of my preamp tube stock, fender 'normal' channel hot rodding, blackfacing, blues jr mods, blues deville mods, reissue mods, etc... etc...marshall mods, orange tiny terror mods, class 5 mods, tons of fender dual channel mods, I love replacing tone and coupling caps- I use film and foil caps (or whatever you want- paper in oil etc) I do a test to figure out which lead connects to the outer foil- then install the capacitor the 'correct' way in the amp.  This is something that is nescessary in the audiophile world, but has been forgotten as of recent in the guitar amp world- and sometimes never done.  This technique seperates those old 'super mojo magic' amps from the 'good ones', I do bigger projects like the SRV super reverb and vibro mods, Jerry Garcia Twin mods.
-I also like to help people put together parts guitars from parts making companies like warmoth, allparts, USACG and musikraft.  I can help you buy hardware and components that will work and fit with your body and neck, as well as help get you better prices and build a guitar that will sound good as a system!

Just email me for more info on how I can help you.  I can do much more than listed here.  I do this in support of my own chasing of the tone.  I am not operating a huge business.  Just wanna help my friends and other local musicians out with quality work for less!