av8or3
Well-known member
Offered here first for those I know will appreciate them are my SRG C+ and (2) hardwood Thieles and (1) hardwood open back 1x12.
The 60 watter is the one that had the compressor built in to it but that was removed with no lingering effects. Below is a letter
Boogiebabies wrote to me outlining the maintenance and repairs he performed when I entrusted him to "bring it up to date"
Hello Jim,
I wanted to give you the info on your IIC+ repairs.
1. Replaced 2- 220uf/300V Filter Caps
2. Replaced 4- 30uf/500V Filter Caps
3. Replaced 2- 47uf/100V Bias Supply Caps
4. Replaced Lead Master with Mesa 250K SPST Switch Pot
5. Replaced .22 cap on Pull Bright on Lead Master with Kemet T110 Hermetically Sealed
and added correct 15K resistor for ground reference.
6. Replaced damaged 1N4006 diode in LDR supply.
7. Replaced 120pf cap for Lead Drive input- Dipped for lower Microphonic Noise
8. Replaced 1000pf cap for Lead Drive Output- Dipped for lower Microphonic Noise
9. Replaced 1000pf cap for Lead Drive Plate Resistor- Dipped for lower Microphonic Noise
10. Replaced 10pf cap for Clean/Lead Channel Input/Output
11. Replaced Two Stand Offs to Metal Type
12. Re-Flowed Solder joints on power tube pins
13. Added Rubber Block to Power Amp board to stop flexing. Factory Fix.
14. Repaired EQ Switching Pop- 68K Resistor from EQ ground to Preamp Ground (Factory Fix)
15. Increased reverb output signal and dwell (Put 220K Resistor back across 1M reverb input for decreased decay)
16. Cleaned and Lubricated original Standby Switch- No Popping present
17. Cleaned Circuit Board Traces with Würth PCB Cleaner
18. Cleaned and Lubricated Presence and Reverb pots with De-Oxit and Fader Lube
19. Sprayed jacks and grounds with De-Oxit
20. Cleaned Jacks with 3500-10000 grit Diamond Abrasives
21. Tensioned all preamp and power tube pins
22. Checked all Resistors and Cathode Caps for drift- All within spec.
23. Bent Reverb Output lug on foot switch jack inward. It was almost shorting to the preamp B+ Voltage
24. Cleaned solder blob from preamp B+ where previous FX-80 voltage was supplied. It was very close to shorting the
preamp B+ rail to ground.
Play Tested: 3 Hours Continuous after capacitor burn in- All functions to spec. No voltage drift.
Plate Voltage in: 473V DC at 115.6V AC Input ) Very High !!!!
Bias Voltage In- PT 1. -48.6 / PT 2. - 48.6
LDR Supply- 13.8V ( 9.4V Lead Mode)
Plate Voltage Out- 446V DC at 115.4V AC Input (448V DC Factory Spec) Perfect !!!
Bias Voltage Out - PT 1. -46 / PT 2. -46 (-46V Factory Spec)
LDR Supply- 12V ( 8.9V Lead Mode)
Note: Your amp may not seem as loud as it used to be. The drop of 27 plate volts back to spec will decrease output power.
Your amp will get a natural compression now at higher volumes as it now has less voltage to draw from. It was using the extra 27V to the power tubes for volume.
Your power transformer runs much cooler now as a benefit of the filter cap change and proper power amp voltages. It will also
be kinder to your preamp and power tubes.
The amp shipped out yesterday. Please feel free to call me after you play test so I can be sure everything is functioning properly.
I returned the 1M pot in the box. If your Volume 1 or Lead Drive pot ever goes bad, it is a perfect replacement part.
I forgot to add a copy of the invoice from Mesa. I can scan or mail you a copy. The total was $52.60 for the filter and bias caps.
The rest of the parts are on me.
Regards,
Ed
I think we all are in agreement that Ed does an incredible jobe when it comes to "blueprinting" these amps, and this one is no exception, it really sings.
$1950.00 + shipping on the amp
$400 ea. + shipping on the extension cabs (amp and cabs are all equipped with EVM12L's)
PM me.
Jim
The 60 watter is the one that had the compressor built in to it but that was removed with no lingering effects. Below is a letter
Boogiebabies wrote to me outlining the maintenance and repairs he performed when I entrusted him to "bring it up to date"
Hello Jim,
I wanted to give you the info on your IIC+ repairs.
1. Replaced 2- 220uf/300V Filter Caps
2. Replaced 4- 30uf/500V Filter Caps
3. Replaced 2- 47uf/100V Bias Supply Caps
4. Replaced Lead Master with Mesa 250K SPST Switch Pot
5. Replaced .22 cap on Pull Bright on Lead Master with Kemet T110 Hermetically Sealed
and added correct 15K resistor for ground reference.
6. Replaced damaged 1N4006 diode in LDR supply.
7. Replaced 120pf cap for Lead Drive input- Dipped for lower Microphonic Noise
8. Replaced 1000pf cap for Lead Drive Output- Dipped for lower Microphonic Noise
9. Replaced 1000pf cap for Lead Drive Plate Resistor- Dipped for lower Microphonic Noise
10. Replaced 10pf cap for Clean/Lead Channel Input/Output
11. Replaced Two Stand Offs to Metal Type
12. Re-Flowed Solder joints on power tube pins
13. Added Rubber Block to Power Amp board to stop flexing. Factory Fix.
14. Repaired EQ Switching Pop- 68K Resistor from EQ ground to Preamp Ground (Factory Fix)
15. Increased reverb output signal and dwell (Put 220K Resistor back across 1M reverb input for decreased decay)
16. Cleaned and Lubricated original Standby Switch- No Popping present
17. Cleaned Circuit Board Traces with Würth PCB Cleaner
18. Cleaned and Lubricated Presence and Reverb pots with De-Oxit and Fader Lube
19. Sprayed jacks and grounds with De-Oxit
20. Cleaned Jacks with 3500-10000 grit Diamond Abrasives
21. Tensioned all preamp and power tube pins
22. Checked all Resistors and Cathode Caps for drift- All within spec.
23. Bent Reverb Output lug on foot switch jack inward. It was almost shorting to the preamp B+ Voltage
24. Cleaned solder blob from preamp B+ where previous FX-80 voltage was supplied. It was very close to shorting the
preamp B+ rail to ground.
Play Tested: 3 Hours Continuous after capacitor burn in- All functions to spec. No voltage drift.
Plate Voltage in: 473V DC at 115.6V AC Input ) Very High !!!!
Bias Voltage In- PT 1. -48.6 / PT 2. - 48.6
LDR Supply- 13.8V ( 9.4V Lead Mode)
Plate Voltage Out- 446V DC at 115.4V AC Input (448V DC Factory Spec) Perfect !!!
Bias Voltage Out - PT 1. -46 / PT 2. -46 (-46V Factory Spec)
LDR Supply- 12V ( 8.9V Lead Mode)
Note: Your amp may not seem as loud as it used to be. The drop of 27 plate volts back to spec will decrease output power.
Your amp will get a natural compression now at higher volumes as it now has less voltage to draw from. It was using the extra 27V to the power tubes for volume.
Your power transformer runs much cooler now as a benefit of the filter cap change and proper power amp voltages. It will also
be kinder to your preamp and power tubes.
The amp shipped out yesterday. Please feel free to call me after you play test so I can be sure everything is functioning properly.
I returned the 1M pot in the box. If your Volume 1 or Lead Drive pot ever goes bad, it is a perfect replacement part.
I forgot to add a copy of the invoice from Mesa. I can scan or mail you a copy. The total was $52.60 for the filter and bias caps.
The rest of the parts are on me.
Regards,
Ed
I think we all are in agreement that Ed does an incredible jobe when it comes to "blueprinting" these amps, and this one is no exception, it really sings.
$1950.00 + shipping on the amp
$400 ea. + shipping on the extension cabs (amp and cabs are all equipped with EVM12L's)
PM me.
Jim
