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Post by antonio on May 2, 2021 0:33:13 GMT
This is forward thinking, I'm not changing my KT88's just yet, but I have been concerned about biasing since my amp does not have those easy to use top plate access holes, so it's a case of taking the bottom plate off. But with all those volts lurking about, and me no electrician I feel I've got good reason to be concerned.  A bit of research and I saw a BiasMaster master used in a photo so Googled that, £230  , a bit rich for me so the search continued. Finally came up with a similar item on AE, www.aliexpress.com/item/33021031440.html?spm=a2g0s.8937460.0.0.1f442e0e2TqmwO and thought I'd ask to see what the 'experts' say. My thinking was you don't have to switch off and then on 4 times (4 x KT88), I know I will have to take the bottom plate off to get at the bias adjuster, but I will take great care in this, and also I thought it would make life easy for simply checking the bias, hopefully not having to adjust every time. I don't own a multi-meter (honest, I didn't know it was obligatory to be a member of this forum) so I'm guessing a saving of $20+ has also got to be taken into account since it comes with a meter. I look forward to your replies, there maybe more questions to come when I actually have to 'get me hands dirty' and change the valves. |
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Bigman80
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Post by Bigman80 on May 2, 2021 6:23:56 GMT
This is forward thinking, I'm not changing my KT88's just yet, but I have been concerned about biasing since my amp does not have those easy to use top plate access holes, so it's a case of taking the bottom plate off. But with all those volts lurking about, and me no electrician I feel I've got good reason to be concerned. A bit of research and I saw a BiasMaster master used in a photo so Googled that, £230 , a bit rich for me so the search continued. Finally came up with a similar item on AE, www.aliexpress.com/item/33021031440.html?spm=a2g0s.8937460.0.0.1f442e0e2TqmwO and thought I'd ask to see what the 'experts' say. My thinking was you don't have to switch off and then on 4 times (4 x KT88), I know I will have to take the bottom plate off to get at the bias adjuster, but I will take great care in this, and also I thought it would make life easy for simply checking the bias, hopefully not having to adjust every time. I don't own a multi-meter (honest, I didn't know it was obligatory to be a member of this forum) so I'm guessing a saving of $20+ has also got to be taken into account since it comes with a meter. I look forward to your replies, there maybe more questions to come when I actually have to 'get me hands dirty' and change the valves. That's a great bit of kit! |
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Post by antonio on May 2, 2021 9:24:36 GMT
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Bigman80
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Post by Bigman80 on May 2, 2021 9:46:50 GMT
To be fair I'd use a multimeter 🤣 |
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Post by jandl100 on May 2, 2021 10:33:32 GMT
Just buy my Primaluna Prologue 5 power amp. Auto biasing, just plug and play.
You'll have to up your Wigwam offer a bit, but I promise I'll give it a wipe before I pass it on to you.
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Post by antonio on May 2, 2021 13:58:48 GMT
Don't tell me you've refused my offer Jerry, and you really need a good pre. Prima Luna are a little out of my price range now, not only that it's getting it over here. I do like the idea of auto biasing, and being able to use so many different tubes.
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Post by antonio on May 2, 2021 14:09:10 GMT
To be fair I'd use a multimeter 🤣 Have you changed your mind? Don't forget I've never done this sort of thing before, you can do all 4 tubes without switching off/on 4 times, which I assume is a bug bear waiting each time you switch off for everything to discharge. May I ask why you would still use a multi-meter? |
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Bigman80
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Post by Bigman80 on May 2, 2021 19:57:54 GMT
To be fair I'd use a multimeter 🤣 Have you changed your mind? Don't forget I've never done this sort of thing before, you can do all 4 tubes without switching off/on 4 times, which I assume is a bug bear waiting each time you switch off for everything to discharge. May I ask why you would still use a multi-meter? No, I would just use a Multimeter. No reason other than I have one and don't mind getting zapped now and again. You kind of get used to it 🤣 |
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Post by antonio on May 3, 2021 0:03:50 GMT
Exactly, you've got a multi-meter now, but if you didn't and were buying now, would that change your mind, and don't forget I'm a newbie at this, and would like to make it as easy and SAFE as possible.
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Bigman80
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Post by Bigman80 on May 3, 2021 7:46:16 GMT
Exactly, you've got a multi-meter now, but if you didn't and were buying now, would that change your mind, and don't forget I'm a newbie at this, and would like to make it as easy and SAFE as possible. Defo. I love a gadget so I'd be all over on of those tube jobbies. |
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A bit of research and I saw a BiasMaster master used in a photo so Googled that, £230 
, a bit rich for me so the search continued.
