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  1. Replies
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    I know from personal experience that sometimes if...

    I know from personal experience that sometimes if you publicly endorse the product you are offered a discount. I haven't used this particular company so I don't know about them. I think on my case I...
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    I'm sure he is. They way these guys work I'm...

    I'm sure he is. They way these guys work I'm pretty sure Nigel gets a discount as a result of the endorsements.
  3. Thread: What's My Name?

    by nickb
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    196

    I got quite a bit more info on this from the...

    I got quite a bit more info on this from the owner. Interesting but still no name. The following is edited from the owner, any opinions expressed are just that.

    "Tam Lynch was the guy that made...
  4. Thread: What's My Name?

    by nickb
    Replies
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    196

    The polyfuse was one of the things I was going to...

    The polyfuse was one of the things I was going to mention. On reflection I don't think the concern is warrantied for a couple of reasons. First, it's a 7.5A trip current device i.e. 450W into 8 ohms...
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    You can have NPTH's wherever you want them with...

    You can have NPTH's wherever you want them with any number of layers. You just specify it in your gerbers / drill files.
  6. Thread: What's My Name?

    by nickb
    Replies
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    196

    I guess I missed that branding. Never mind. The...

    I guess I missed that branding. Never mind. The one you linked is different but this is still a 50W combo. On checking I see simply upload the wrong photos.

    They clearly went to some trouble to...
  7. Thread: What's My Name?

    by nickb
    Replies
    9
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    196

    Dang - I missed that I thought I had obscured all...

    Dang - I missed that I thought I had obscured all the names in the interest of fun.
  8. Thread: What's My Name?

    by nickb
    Replies
    9
    Views
    196

    What's My Name?

    Something completely different came my way. I think this is something very few will have seen. I haven't got a full set of pics yet, but I'll add when I have it back together. I know the name of...
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    1,002

    I think the B+ supply test rules out the bias...

    I think the B+ supply test rules out the bias supply as the issue. Next most likely suspects are the coupling caps into the EL84 grids i.e. C15 and C16. Also the plate resistors R28, R30 and R29 are...
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    These are for he S1. He needs the S7 MK2.

    These are for he S1. He needs the S7 MK2.
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    We now know 1) It's before the EL84's 2) It's...

    We now know
    1) It's before the EL84's
    2) It's after the LTPI
    3) It's common to both EL84's
    The common things in that area are the bias supply and the HT supply to the LTPI. Of course there is an...
  12. I am thinking of the wrong model amp? Have a pic?...

    I am thinking of the wrong model amp? Have a pic? Here's where I used one of these on Twin Reverb and there was plenty of room:

    54690
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    ..and further add... think about your liability...

    ..and further add... think about your liability if it all goes horribly wrong. Adam may not touch it then and you'll looking at a very large bill. Sometimes you have to know when to run away.
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    It might be rubbing you your inner need for...

    It might be rubbing you your inner need for vacuum tubes the wrong way but you'll much better balance at a fraction of the cost by using a couple of 10 cent transistors. The ratio of signal current...
  15. If you search the 'bay' for "Electric...

    If you search the 'bay' for "Electric Potentiometer Switch Knob Control Pot Push Pull" you find suitable candidates based on 16mm pot. PC pins / lugs / differing threaded length are all there.

    If...
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    At $28,000 each and still in production the owner...

    At $28,000 each and still in production the owner should be taking them back to Adam. You would be really lucky to get a schematic for this from anywhere.
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    ^^^^^^^THIS^^^^^^^ I could not agree more. ...

    ^^^^^^^THIS^^^^^^^
    I could not agree more.

    Expect PT meltdown soon.
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    When you get back put the EL84's back in and pull...

    When you get back put the EL84's back in and pull the 12AX7 next to the EL84s and report on the noise status.
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    The 5Y3 will drop something like 60V so knocking...

    The 5Y3 will drop something like 60V so knocking the B+ down quite a bit when loaded. Agree it seems like a poor choice for the expected DC current.

    Another couple of clues would be the...
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    Does removing the PI tube make any difference? ...

    Does removing the PI tube make any difference? If no, have you tried removing the EL84's one at a time and then both? If it still happens with both, disconnect the output transformer one terminal...
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    I'm almost speechless... OK so the problem is...

    I'm almost speechless...

    OK so the problem is after the 470/510 resistor. The 6V6 has been mentioned several times. It could be that, it could be it's cathode bypass cap or...other things.
    ...
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    You didn't mention the all important 470 ohm...

    You didn't mention the all important 470 ohm resistor that keeps burning up. What is it connected to?

    No scanner? Digital camera? Smart phone? Camera on computer?

    There are lots of online...
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    A few clear gut shots would probably do the trick.

    A few clear gut shots would probably do the trick.
  24. Thread: Tube tester

    by nickb
    Replies
    16
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    907

    This was the thing that jumped out at me. This...

    This was the thing that jumped out at me. This seems to be poorly done rewind and the crucial insulating varnish step has been missed making it potentially dangerous.
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    You did the right thing in verifying the fan...

    You did the right thing in verifying the fan operation :thumbsup:
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    I think you might short out the AC power input if...

    I think you might short out the AC power input if you did that. I expect that T1/T2/T3/t4 are there to allow you to connect two 115V primary windings in series or parallel for 115/230V operation.
    ...
  27. So when the nutube wears out it's a junker. What...

    So when the nutube wears out it's a junker. What a let down. Doesn't compare with a traditional tube well at all.
  28. I was shown a technique that sidesteps the...

    I was shown a technique that sidesteps the dustcap & shimming. You first glue and let set the inside part of the surround. Nowyou glue the outer using PVA. Apply 50/60Hz to the speaker from a 12v...
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