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How often to change tubes in mic pre.

Forum Audio : Pro Audio - How often to change tubes in mic pre.

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P   03-05-2005 at 01:43:59 AM

Archived from groups: rec.audio.pro (More info?)

 

I have a TubeTech MP-1A Tube Mic-Pre an was wondering how often tubes
actually need to be replaced.

Any advice much appreciated.

P

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Anonymous   03-05-2005 at 01:49:45 AM
- 0 +

Archived from groups: rec.audio.pro (More info?)

 

In article <e30i21pb1qk46g1iba009am8sqeiknp8mr@4ax.com>,
p <blah@blah.com> wrote:
>
>I have a TubeTech MP-1A Tube Mic-Pre an was wondering how often tubes
>actually need to be replaced.
>
>Any advice much appreciated.

In a well-designed circuit, good small signal tubes last for decades
of continuous operation. Power tubes don't last anywhere near as long,
but in a typical tube preamp without a high power 600 ohm output stage,
thirty or forty years should be fine. Won't hurt to do an emission test
every once in a while to make sure.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Reply to Anonymous
Anonymous   03-05-2005 at 01:16:45 PM
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Archived from groups: rec.audio.pro (More info?)

 

in article e30i21pb1qk46g1iba009am8sqeiknp8mr@4ax.com, p at blah@blah.com
wrote on 3/4/05 4:43 PM:

>
> I have a TubeTech MP-1A Tube Mic-Pre an was wondering how often tubes
> actually need to be replaced.
>
> Any advice much appreciated.
>
> P

I'd say virtually never, barring the very occasional catastrophic failure...
preamp tubes last a loooong time generally.

-jeff

Reply to Anonymous
P   03-06-2005 at 03:38:14 PM
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Archived from groups: rec.audio.pro (More info?)

 

On Fri, 04 Mar 2005 19:43:59 -0500, p <blah@blah.com> wrote



Thanks Guys.

P

Reply to P
Anonymous   03-06-2005 at 03:38:15 PM
- 0 +

Archived from groups: rec.audio.pro (More info?)

 

As soon as performance goes bad. Probably every 30 years or so?


"p" <blah@blah.com> wrote in message
news:nd5m21tfbnnalbsefk5746gjfqpvmh90mi@4ax.com...
> On Fri, 04 Mar 2005 19:43:59 -0500, p <blah@blah.com> wrote
>
>
>
> Thanks Guys.
>
> P

Reply to Anonymous
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