Search:

Type: Posts; User: Mick Bailey; Keyword(s):

Page 1 of 18 1 2 3 4

Search: Search took 0.04 seconds.

  1. Replies
    3
    Views
    77

    +1. That works just fine.

    +1.

    That works just fine.
  2. Replies
    7
    Views
    117

    If the case is ABS then epoxy will not give you a...

    If the case is ABS then epoxy will not give you a strong bond. I've done some trials with Araldite Rapid, Araldite Standard (24hr) and JB weld. None of the bonds equal the strength of the parent...
  3. Replies
    20
    Views
    374

    It's also useful to remember that old caps had a...

    It's also useful to remember that old caps had a very wide tolerance. -20%/+80% were common. I see a lot of old caps that read high compared to their nominal value.
  4. Caps have followed the path of many electronic...

    Caps have followed the path of many electronic components in getting smaller along with increased performance. The physical size and lead diameter of pretty much everything is reduced. I have no...
  5. Replies
    26
    Views
    303

    A sound guy once said to me that the only talent...

    A sound guy once said to me that the only talent a bass player has is the ability to turn an amp up whilst making it look like its being turned down.
  6. Replies
    12
    Views
    170

    Soldered-in can caps can be difficult. I have a...

    Soldered-in can caps can be difficult. I have a very large iron for those jobs that takes 1/2 hour to come up to temperature and has a massive copper bit. Unless the can is being replaced I find it...
  7. Replies
    26
    Views
    303

    Can't remember how old I was, but the same thing...

    Can't remember how old I was, but the same thing happened to me.
  8. Replies
    12
    Views
    170

    I've recapped a few Traynors, including my own...

    I've recapped a few Traynors, including my own YBA-1A II (since sold). I've never had to mod the grounding and after recapping the amps have all had far less hum (they all had the original stick of...
  9. Replies
    15
    Views
    299

    I've also replaced a fair number of speakers with...

    I've also replaced a fair number of speakers with the same frame stamping as the MG series, though not branded MG. Identical construction in every other respect and branded Celestion. Maybe these are...
  10. Replies
    10
    Views
    188

    The headphones don't cut off the speakers with...

    The headphones don't cut off the speakers with this amp - the master volume has to be turned to zero for silent practice. The first thing I do with any amp is to establish that the DC voltages are...
  11. Replies
    8
    Views
    193

    Now wouldn't that be a fine product? A beer-based...

    Now wouldn't that be a fine product? A beer-based contact cleaner. One squirt for the amp, 10 for the guy dong the repair. In case anyone reading this isn't familiar, IPA = India Pale Ale.
  12. Replies
    15
    Views
    299

    Actually I was doing Marshall a disservice as...

    Actually I was doing Marshall a disservice as there were a good few from Blackstar amps. Speakers mainly G12T and 70/80. Some "MG" labelled - certainly two taken from fairly late Marshall MG combo...
  13. Replies
    5
    Views
    210

    That's the way to go.

    That's the way to go.
  14. Replies
    5
    Views
    210

    I had a customer who early this year imported...

    I had a customer who early this year imported 4x6L6 NOS RCA black plate tubes from the USA. Glad he bought them - after just two weeks one shorted out and another became microphonic. Replaced with a...
  15. Replies
    8
    Views
    193

    It comes down to the combination of plastic,...

    It comes down to the combination of plastic, solvent and also how the part stresses - either from cooling during manufacturing or during use. I've seen this a lot with motorcycle tail light and...
  16. Replies
    15
    Views
    299

    Even when run within their rated power I find...

    Even when run within their rated power I find that many modern speakers will fail through thermal problems. I've just taken a load of the manufacturer-fitted low-end Chinese Celestions for scrap. I...
  17. Replies
    11
    Views
    199

    You use it on tube amps?

    You use it on tube amps?
  18. Replies
    15
    Views
    299

    Not without removing the voice coil and carrying...

    Not without removing the voice coil and carrying out measurements on the wire gauge and construction. A few years ago I had a 6" speaker rated at 600W RMS that had failed. Massively inefficient and...
  19. Replies
    11
    Views
    199

    At one time a scope was a super-expensive and...

    At one time a scope was a super-expensive and bulky item and just too costly for many repair shops. My first scope, a Cossor, weighed about 150 pounds and came with its own trolley. It took up the...
  20. Replies
    27
    Views
    3,075

    Agreed, If the board is faulty, then here in the...

    Agreed, If the board is faulty, then here in the UK it's a better cost option than spending too long on a defective one and it has a better long-term prospect. I've had good success with repairing...
  21. Replies
    27
    Views
    3,075

    Maybe the hum is down to the increased current...

    Maybe the hum is down to the increased current draw on the power tubes as the bias is shifting. Scoping the output tubes should show any oscillation. If there was any DC leakage through the coupling...
  22. Replies
    2
    Views
    167

    Does your trem sound like the one here? ...

    Does your trem sound like the one here?

    https://www.youtube.com/watch?v=xMY5g2SB910

    Some Guyatone amps were rebranded by Selmer in the UK as Futurama.
  23. Replies
    8
    Views
    145

    With the reduced PT load with just a pair of...

    With the reduced PT load with just a pair of tubes and the previously mentioned increase in B+ my choice for a pair of tubes would be KT88, which has better figures than the 6550
  24. I did a repair on a radiogram amp from maybe the...

    I did a repair on a radiogram amp from maybe the late 50s/early 60s that was built in a similar fashion. That particular amp was PCB construction. It had holes in the board to mount regular tube...
  25. There are all kinds of novel tube configurations...

    There are all kinds of novel tube configurations within the world of Hi-Fi that are outside of what we expect. For example, there's an 'inverted triode' connection used with transmitting triodes. The...
  26. Where I don't have a schematic I firstly look to...

    Where I don't have a schematic I firstly look to see if there are schematics of similar models that may offer a clue to the overall topology. Companies often have a certain way of doing things within...
  27. Replies
    17
    Views
    1,119

    Emission testers like the one you have operate on...

    Emission testers like the one you have operate on a fairly low HT and it's practical to derive the voltages safely by other means if the inbuilt transformer is beyond economic reclamation. The same...
  28. Replies
    1
    Views
    130

    Here in the UK the mains plug is fused, too and...

    Here in the UK the mains plug is fused, too and the contacts corrode or just suffer from oxidation. As the resistance creeps up then so does the heat. With vintage amps the plugs can be decades old...
Results 1 to 28 of 500
Page 1 of 18 1 2 3 4