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Old 9th November 2012, 08:37 PM   #1
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Default Yaqin MS 34 D

Hi all wanted to try a valve amp for a long time just won this one but have a few questions. Firstly is it a decent one for the money and do i need any thing to run it on british 240v electric supply. Here is the link to the amp as it says something about a voltage reulator
Brand New ! Yaqin MS-34D EL34B x 4 Highend HiFi Integrated Tube Amplifier | eBay
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Old 10th November 2012, 01:57 AM   #2
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As no one had one of these amps then
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Old 10th November 2012, 08:45 PM   #3
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Cant any one tell me if this amp is any good
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Old 10th November 2012, 09:06 PM   #4
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Appears to be one of the many push pull EL34 variants coming out China. Some are happy with them, some like to tweek them, and some sell them on. What speakers are you going to be using with this amp?

Here's a short review FWIW: http://forum.audiogon.com/cgi-bin/fr...mps&1258610764

jeff

Last edited by vinylkid58; 10th November 2012 at 09:10 PM.
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Old 10th November 2012, 09:15 PM   #5
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Originally Posted by vinylkid58 View Post
Appears to be one of the many push pull EL34 variants coming out China. Some are happy with them, some like to tweek them, and some sell them on. What speakers are you going to be using with this amp?

Here's a short review FWIW: AudiogoN Forums: Review: Yaqin (China) MS-34D Tube amp

jeff
Thanks for reply jeff im going to be useing mission m74 speakers for now. Allways fancied a tube amp but im a bit confused about something called biasing
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Old 10th November 2012, 09:15 PM   #6
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Well, it's not really "Highend" as they say... and no, you should not run it directly on 240v: the heater voltage would be higher than normal (6.9v instead of 6.3). The difference may seem small, but it would seriously shorten the tubes' lives.

What to do? Have it modded by a pro, or run it on a Variac... Or buy another amp.
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Old 10th November 2012, 09:18 PM   #7
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Originally Posted by Vincent77 View Post
Well, it's not really "Highend" as they say... and no, you should not run it directly on 240v: the heater voltage would be higher than normal (6.9v instead of 6.3). The difference may seem small, but it would seriously shorten the tubes' lives.

What to do? Have it modded by a pro, or run it on a Variac... Or buy another amp.
Oh dear what have i done. Whats a variac
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Old 10th November 2012, 09:54 PM   #8
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AC adjustable voltage divider.
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Old 10th November 2012, 10:34 PM   #9
12E1 is offline 12E1  United Kingdom
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One question - do you know what your mains voltage really is? In the UK, it is nominally 230 volts with a tolerance of +10% to -6% (the official 240 value was quite a long time ago). It will vary quite a lot from one location to another. In my home I see around 235V, at work I often see about 244V. For historic reasons in many places it is more likely to be above 230 than below.
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Old 10th November 2012, 10:44 PM   #10
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Desppain not, If you kindly ask them for a schematic, they ll likely send you one, and the nice ppl here will tell you what to do and how,

But first, the million euro question: Are you handy with a soldering iron?

About the Audiogon Review: "Pure Class A" yeah riiiiight...

Last edited by costis_n; 10th November 2012 at 10:46 PM.
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