Very good to view you again. I am going to undertake the V1 R6 resistor mod using a Richard Allenby carbon film just one. I've study onj An additional Discussion board about adding an earth on the 3rd bass Manage tag. Any remarks everyone?
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After that I believe the amp would be suitable up there tone wise, Even though right this moment I’m pretty satisfied with how my amp is sounding.
Many thanks for halting by and posting a comment. I feel the only mods remaining, to totally iron out the weak spots for AC15, is to change all the coupling caps to Sozo’s, and to switch the output transformer using a Mercury Magnetics.
How old is your amp and are you currently utilizing the stock valves? Weak bass reaction is usually an indication that the electrical power valves are starting to wear out.
Many thanks with the instructive report which I found while doing maintenance Focus on just one of those voxes. Just asking yourself, within the Image it appears to be as though R72 and R73 are the 82R as specified to the schematic I have. Nevertheless, I pulled 220R resistors out of those positions, both of those O/C and both equally triggering board burnout and arcing to ground. They were Tremendous inexpensive resistors and didn’t fairly look ‘manufacturing unit mounted’ in case you really know what I suggest. The only thing is, the customer is adamant that he acquired the amp completely new so somebody is either lying to him, the amp was messed with in The shop or Vox experienced a revision at some point with this price, possibly indicated by Rev2D inside the schematic notes.
Hey I see you’ve also replaced the facility transformer by using a mercury magnetics one particular. May possibly I inquire what strengths are there of upgrading the power transformer since it’s really high-priced…
Though not essentially the most ‘elegant’ way of executing matters, you can go about swapping resistors the best way you talked about. Whilst I’d be mindful that any Latest e-juices from Vape Cave time you re-solder the resistors, the connections are great and strong. You shouldn’t have any difficulties overheating the PCB though, for those who’re applying the proper iron at the correct temperature.
I've this amp I'd true bad luck: an individual stoled the enter component While using the jack and pcb so I are not able to make use of the amp. I attempted to use a jack and wires direct on the minisocket with two holes nonetheless it Appears very little just a few Odd noises at times.
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This should be a tremendous thing to consider for anybody seeking a mechanical mod. Because mechs deficiency defense circuitry, it’s up towards the company and person to guarantee protection. The mod should really present ample ventilation for when the battery heads up.
one hour function to maneuver some wires inside and One more hour to cut out the exessive steel from the perimeters. I even mounted the amp for the rack by means of holes on sides of your front panel.
Hi, Excelents mods my Buddy. I lately do it on my amp, aside from ‘choque mod’ It’s not clear…you'll find diferent magnitude of units, one particular is Henry, Yet another is Ohms.. I did’nt know how does one substitute It..
I learn about modifying resistors for maintaining the voltage small adequate for preserving the tubes from way too hight voltage. The vendor from the choke says if All those two values (H, mA) in good shape While using the suggested (MM), the ohm value shouldn’t change lots.