[TenTec] Centaur Tubes odd ones in parallel

[Dave Edwards]

Rick....Not sure I talked to you about this or not, but
...Your HA-14 amp...have you replaced the filter caps in the power supply?
...Dave
On 4/1/15 11:30 AM, Rick - DJ0IP / NJ0IP wrote:
> Bob, you have been very lucky if you have never had any problems with
> unmatched tubes.
> I certainly have.
>
> In fact I finally decided not to own any multi-tube amps anymore.
> That solved that problem. (almost)
>
> I now only have two amps, each with a single 3-500z, but...
> I also have an old Heathkit HA-14 mobile amp with a pair of 572B tubes.
> Can't seem to find a replacement for that one.  There are no tiny amps with
> single tubes running that much power.
>
> I don't care much for most transistor amps.
> Their linearity is the pits!
> Though I wouldn't mind having the Elecraft 500w amp...
> Jim sure raves about his!
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Katz Ajamas
> Sent: Wednesday, April 01, 2015 5:14 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Centaur Tubes odd ones in parallel
>
> Kris-
>
> Are these 811 or 572?  I've never owned a Centaur but have not had any
> trouble with non-matched tubes in other amps, provided they were from the
> same OEM.
>
> A single used 811 or 572 should be pretty cheap, so how about hunting up one
> each of the missing?
>
> 73, Bob ah7i/w4
>
>
>
>
>
>
>> ------------------------------
>>
>> Message: 9
>> Date: Tue, 31 Mar 2015 15:39:40 -0400
>> From: <km2km at twc.com>
>> To: tentec at contesting.com
>> Subject: [TenTec] Centaur Tubes odd ones in parallel
>> Message-ID: <20150331193940.EK621.275017.root at dnvrco-web01>
>> Content-Type: text/plain; charset=utf-8
>>
>> Ok, guys, here is the scoop.
>>
>> My trusty Centaur seldom needs to be re-tubed, BUT now I have two
>> pairs of tubes,  one pair Taylor, and the other pair Svetlana because over
> time one
>> tube left the troika for the electronic dump.   Yes, matched tubes are the
>> ideal, but having a couple of pairs sitting around doing nothing for
>> me and no foreseeable makes me wonder.  Just what would happen if they
>> were a mixed troika.  That would leave one tube in the bin ready for
> another time.
>> Any ideas on dire consequences?
>>
>> Many thanks,
>>
>> Kris KM2KM
>> MERSCHROD
>> 123 Warren Road
>> Ithaca, NY 14850
>>
>>
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>>
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>> ------------------------------
>>
>> End of TenTec Digest, Vol 147, Issue 34
>> ***************************************
>>
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