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  1. Replies
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    Update: I just had a talk to the guy who's...

    Update:


    I just had a talk to the guy who's selling the Peavey 410 TX bass cab to me, and he said that I have finished paying the money for it, so it is officially mine.
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    I remember buying a piece of old radio gear from...

    I remember buying a piece of old radio gear from the local dump shop here in Darwin, I decided to rat it for parts and scored myself three nice 9-pin valve sockets with shields, the insulation they...
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    I've had some good success with using valve...

    I've had some good success with using valve sockets I've salvaged from old bits of gear in the past, so it is indeed doable, you just have to make sure that the sockets are in reasonably good...
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    Yep, I took a power transformer from a defunct...

    Yep, I took a power transformer from a defunct reel-to-reel tape recorder, pulled it apart so that I had a cardboard bobbin and a set of iron laminations left after removing all the windings out of...
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    The consensus we came up with is that the 12AX7...

    The consensus we came up with is that the 12AX7 tube/valve doesn't really do much tonewise at low volumes due mainly to how it is configured in the circuit, it's not really providing much in the way...
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    Yep, I noticed that and I agree, it's a bit...

    Yep, I noticed that and I agree, it's a bit unusual to go about generating the +HT supply in a bit of a roundabout way like that, perhaps it's a cost-cutting measure so that Carvin wouldn't have to...
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    Totally agree with you there, from a servicing...

    Totally agree with you there, from a servicing point of view if a schematic also shows the typical voltages at various points on the schematic, that's definitely more of a help, I was a bit unsure...
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    First item on my parts shopping-list is a new and...

    First item on my parts shopping-list is a new and properly-rated power transformer for my Soldano SLO 50 build, I've got a suitable one saved on my wishlist on my account with Evatco, it's going to...
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    I recently bought four 500g bargain grab bags of...

    I recently bought four 500g bargain grab bags of bits and pieces from my local Jaycar Electronics shop, they each cost me Au$9.99, anyway, once I got them home from the shops I opened them up and...
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    A total of $241.00 actually sounds quite...

    A total of $241.00 actually sounds quite reasonable, given that a vintage 5E3 in reasonably decent condition would maybe cost ten times that, as Marcel said, I would like to welcome you to the DIY...
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    I just downloaded a pdf of the Carvin BX500...

    I just downloaded a pdf of the Carvin BX500 Revision F schematic, I'm not sure if it is the exact revision you have, but it should be close enough, anyway, just been studying the tube/valve circuit...
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    My Fender Super Twin and it's Ashton 4 X 12 cab...

    My Fender Super Twin and it's Ashton 4 X 12 cab is most likely overkill too....lol.

    But you have to admit, nothing looks cooler than an amp head sitting on a big 4 X 12 cab.
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    @ JohnH Nice score!!!, you can buy castors at...

    @ JohnH Nice score!!!, you can buy castors at your local Bunnings shed, they have some pretty nice ones in stock that feature a handy little brake-lever, if you do end up buying some from Bunnings,...
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    Good point, might be a good idea doing a set of...

    Good point, might be a good idea doing a set of scope screenshots for both a single triode-stage as well as some screenshots for two triode-stages in series as you would find in a guitar amp, we...
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    Apparently, when the tube is being lightly...

    Apparently, when the tube is being lightly overdriven, and you're getting that warm sound out of it, the distortion consists of mainly even harmonics due to asymmetric soft-clipping, I remember doing...
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    It's also possible that the 12AX7 Valve is...

    It's also possible that the 12AX7 Valve is contributing a subtle effect on the overall sound of the amp.
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    They are usually called Tubes in places like the...

    They are usually called Tubes in places like the United States, they are more commonly known as Thermionic Valves in places like the United Kingdom and Europe, but it basically means the same thing...
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    The best way to remove a 12AX7 tube from it's...

    The best way to remove a 12AX7 tube from it's socket is to gently move it from side to side while pulling so you basically are walking it out gradually, try to be gentle while you're doing that so...
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    Update: Recently I got in contact with a mate...

    Update:

    Recently I got in contact with a mate of mine who just happens to do amp servicing, he offered to give me some second-hand 16uF/450V and 22uF/500V capacitors he had pulled out of an amp,...
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    Nice choice, if you start a build thread in the...

    Nice choice, if you start a build thread in the Amplifiers section I'll definitely be following it, if you need any help feel free to ask me.
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    For me, I basically know how to wire up the...

    For me, I basically know how to wire up the speakers so they are phased correctly and work properly, and that's more or less it.
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    I seem to remember doing some work on a Hartke...

    I seem to remember doing some work on a Hartke bass amp a few years ago, if my memory serves me right it had a control on the front panel which allowed you to blend between a solid-state preamp and a...
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    You both sound more knowledgeable about speaker...

    You both sound more knowledgeable about speaker cab design than what I know about speaker cab design, I'm still a bit of a novice.
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    Will do mate, if I get stuck I'll know who to...

    Will do mate, if I get stuck I'll know who to ask, I really appreciate everyone's contributions to this thread so far.....cheers!!!!


    If there's anyone else who want's to contribute, please feel...
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    That may actually be the best thing for me to do,...

    That may actually be the best thing for me to do, first find out the internal volume in liters, then find the Thiele-Small parameters, then do the math, something I've never done before but I like a...
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