Lovely 1977 Silverface Twin Reverb.. one of the last ones that was not Ultra Linear and 100 Watts not squeezed up to 135 Watts. Sounded really good after some basic work and a few tweaks. then decided to blackface her and mod the Normal channel to have reverb and vibrato and Bassman tone stack.. Attitude control also added. Well made and great sounding amp!
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- Lovely looking Fender Twin Reverb 1977 in need of some work..
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- All original inside not a single component ever changed
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- Checked out the screen grid resistors.. should be 470 Ohm.. all closer to 1K
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- 4 new resistors ready to go in
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- In place!
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- Checking her out on the bench.. got her working a few issues with preamp tubes and power amp tubes not matched at all and impossible to bias correctly.. new ones needed..
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- caps all original.. not showing signs of issues but do need replacing
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- New caps in!
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- working on the bench
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- Vibrato not working..
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- This “bug” is the issue
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- Light dependant resistor too high resistance even under bright light.. so was replaced
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- New output tubes in and baised up (adjustable bias pot also added)
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- Working on the bench but issues with Reverb
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- One of the issues.. this side just not connected..
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- Old master volume pot (push pull) had issues so was replaced with a simpler 1 Meg pot and the push pull feature removed did not sound good..))
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- New pot in position
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- Working well!
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- Few pics of the guts before assembly
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- As she came with a single Celestion. I sourced another
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- Soe, better screws for fixing the speakers in..
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- Cab stripped
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- Speakers installed
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- Looking good!
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- Grill showing signs of wear but useable
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- Speakers soldered to jack lead
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- Chassis back in and tested workng well!
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- rear view
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- Bacjk panels on and new switch attached for Vib and Rev!
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- Sounding great with my Lord Player all ready to sell!
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- Then opened her up to “Blackface her”
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- PI area taken to blackface values
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- Normal Channel also changed to Fender Bassman Tonestack and Reverb and Vibrato Added
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- Attitude control added.. alowing negative feedback top be reduced to loosen up the amp.
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- Celestiona swapped out for a set of Utah/Pyle 1973 speakers that are in great condition and sound excellent in the amp
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- Cones are perfect and nicely stiff considering their age.. no farting out
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- Castors installed
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- Sounding fantastic!
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- Ebay sale pics
