Fender Twin Reverb 1972 Serious Service.. including recap Blackfacing and Normal Channel Revoicing

  • As she came in 1972 Fedner Twin with master volume but not Ultra LinearAs she came in 1972 Fender Twin with master volume but not Ultra Linear
  • Tube LayoutTube Layout
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  • Original RCA output tubes.. all test good but not well matchedOriginal RCA output tubes.. all test good but not well matched
  • Pyle Speakers.. original and looks like original cones..Pyle Speakers.. original and looks like original cones..
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  • Final Assemby by Mr J. ShultsFinal Assemby by Mr J. Shults
  • Chassis out assembled by Mr Richard Hand.on the 11th March 1972Chassis out assembled by Mr Richard Hand.on the 11th March 1972
  • All components original no on has touched anything since 1972!All components original no on has touched anything since 1972!
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  • She will have all the electrolytics replaced before I fire her upShe will have all the electrolytics replaced before I fire her up
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  • Speakers out while cab is repariedSpeakers out while cab is reparied
  • Love the RCA tubes!Love the RCA tubes!
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  • Front baffle a little cracked. Will reinforce this (not such a simple job to replace as this baffle is glued in..Front baffle a little cracked. Will reinforce this (not such a simple job to replace as this baffle is glued in..
  • Nice Fender Logo with a tail!Nice Fender Logo with a tail!
  • Cab empty cleaned up and screw holes filled (all a bit stripped.Cab empty cleaned up and screw holes filled (all a bit stripped.
  • Cleaning up the sliverfaceCleaning up the sliverface
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  • Pyles back in but turned out to be a bit flabbly.. and damaged around the edges.. really need a reconePyles back in but turned out to be a bit flabbly.. and damaged around the edges.. really need a recone
  • Cab cleaned up and Pyle speakers back inCab cleaned up and Pyle speakers back in
  • Caps beady to be replaced...Caps beady to be replaced…
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  • new caps fittednew caps fitted
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  • Resistors taken to AD763 specResistors taken to AD763 spec
  • Before BlackfacingBefore Blackfacing
  • With the PI modded to blackface specsWith the PI modded to blackface specs
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  • One Plyel was seriously flabby.. so replaced with an Eminence Legend,.. (another on order)One Plyel was seriously flabby.. so replaced with an Eminence Legend,.. (another on order)
  • Reverb tank being checked out,, no issues!Reverb tank being checked out,, no issues!
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  • Testing out on the bench and sounding sweet!Testing out on the bench and sounding sweet!
  • Two legends now fittedTwo legends now fitted
  • Reverb tank back inReverb tank back in
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  • Sounding good just needs the grillSounding good just needs the grill
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  • New Gril cloth on and logo attachedNew Gril cloth on and logo attached
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  • Love the longtail on these early SilverfacesLove the longtail on these early Silverfaces
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  • All sounding good and footswitch repairedAll sounding good and footswitch repaired
  • decided to change the tone stack on the normal channel to a Tweed Bassman TOnestack (but liike an early Marshall tone stacldecided to change the tone stack on the normal channel to a Tweed Bassman TOnestack (but liike an early Marshall tone stacl
  • 2x0.022uF caps in place2×0.022uF caps in place
  • Also was a bit frustrated about the poorly matched, but lovely, old tubes in her so modded the bias to be able to individually bias each tube, I needed to add a couple more 0.1uF coupling caps for this. It was worth the effort!Also was a bit frustrated about the poorly matched, but lovely, old tubes in her so modded the bias to be able to individually bias each tube, I needed to add a couple more 0.1uF coupling caps for this. It was worth the effort!
  • Chassis just before putting back in again (I did after this shorten a few leads but forgot to photo the result)Chassis just before putting back in again (I did after this shorten a few leads but forgot to photo the result)
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  • note the old master volume wires used for the variable negative feedback.note the old master volume wires used for the variable negative feedback.
  • Put the spare 10K pot (from the Normal Channel Tone Stack) in the master volume slot as a NFB control or "Soul" controlPut the spare 10K pot (from the Normal Channel Tone Stack) in the master volume slot as a NFB control or “Soul” control
  • AB box I use for channel switchingAB box I use for channel switching
  • Soul control really works well withthe NFB turned down she breaks up really nicely at not to crazy volume and tightens up as the control increases feedback. Makes the amp really flexible!Soul control really works well withthe NFB turned down she breaks up really nicely at not to crazy volume and tightens up as the control increases feedback. Makes the amp really flexible!
  • Workout with some of my fave pedals!Workout with some of my fave pedals!

Fantastic 1972 Silverface Twin Reverb came in looking a bit sorry for itself with a metal grill. I Serviced and modified her and now will nor let her go.. my own No 1 Amp: Full recap of all electrolytics Circuit modded to AB763 specs (Blackface) Normal Channel Modded to a Tweed Bassman tone stack (more gain and not so much mid scoop) Reverb and Vibrato added to the Normal Channel Original RCA tubes kept but bias modified to be able to adjust bias on each tube individually (not a matched set at all) Master Volume Removed and a “Soul” Control added (so you can adjust negative feedback) adjusts the whole attitude of the amp 2x Eminence Legend 1258 speakers replaced the too knackered Pyle Speakers Most of the preamp tubes needed replacing (they gave out or became noisy during testing) New grill cloth put on 2 more handles added to make the amp more “portable”

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