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Old 21st December 2012, 04:19 AM   #1
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Default 6146B?

Has anyone used this tube in an audio amp here?

Any sound impressions compared to 6560, KT88, etc.

Thanks!
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Old 21st December 2012, 04:47 AM   #2
freax is offline freax  Australia
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Thought I recognised that insignia... Its strange seeing a RF beam power tube on diyaudio.com, then again...

6146 in the Simple SE
http://faculty.frostburg.edu/phys/la.../6146b_big.pdf

Beware though that there are significant variations between brands of this same model, this does affect RF performance though you would have to ask one of the other smarties wether or not it would affect AF performance...
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Last edited by freax; 21st December 2012 at 04:51 AM.
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Old 21st December 2012, 06:09 AM   #3
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Let me google that for you
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Old 21st December 2012, 06:12 AM   #4
SandyG is offline SandyG  United States
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I think I have seen an old Acrosound 100w amp that used 6146's and possibly older Ampeg SVT Guitar amps. No idea how they sound.

Sandy
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Old 21st December 2012, 08:45 AM   #5
AJT is offline AJT  Philippines
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in my ARRL handbook of 1960, a pair can produce 120 watts as a modulation amplifier...as to how it sounds depends on the OPT and circuit used...haven't built one yet although i have several of them on hand...
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Old 21st December 2012, 11:09 AM   #6
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Quote:
Originally Posted by aardvarkash10 View Post
Ha! That's funny, but I google for hours before I will post something like this. I asked how they sound subjectively. I can find circuits

Regarding the other post with the Acro iron, they use the proprietary windings for UL. It's not easy to replicate.

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Old 21st December 2012, 12:41 PM   #7
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Not a good audio tube, the screen is somewhat prone to exploding if over driven... shorting the tube... I have never heard anyone at any time say that they liked how they sound. Of course that doesn't mean much.

_-_-bear

PS. spectacularly unpopular for modulators in ham radio...
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Old 21st December 2012, 12:45 PM   #8
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Thanks,

That's more less what I'm looking for. I notice that it handles highish plate voltage, and thought it looked like a decent candidate for my Bogen overhaul.

I've seen the Acro and an old theater amp schematic with them, but your point is probably why the schematics are few and far between.

Blair
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Old 21st December 2012, 02:43 PM   #9
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You should not worry about 6146B as a candidate for the output tubes.
I have not heard "bad sounding" tubes yet, but some bad sounding amplifiers.

The final result depends mostly on the design and how the amplifier is "fine tuned", not what tubes are used.
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Old 21st December 2012, 04:36 PM   #10
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Quote:
Originally Posted by bear View Post
I have never heard anyone at any time say that they liked how they sound.
_-_-bear

PS. spectacularly unpopular for modulators in ham radio...
Over 20 years ago Ned Carlson told me that 6146 was a bad sounding audio tube and, along with a lot of other useful advise I received from him, I have respected his opinion.
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