[Amps] 3-1000 Amplifiers

[Roger (sub1)]

On 5/11/2011 10:38 AM, Bill Fuqua wrote:
> I think in the more extreme cases the metal can rust and expand and crack
> the seal.
> But it may take some time for that to migrate thru the entire seal.
> However, thinking about it a bit,
> a small crack could expand when the glass is under thermal stress.
> Bill
>
>
> At 09:59 AM 5/11/2011 -0400, Randall, Randy wrote:
>> I would wonder about the 3-1000 glass to metal seals.  Since the 3-1000
>> constructed similarly to the 3-500z, would not it have the same issues
>> with the pin seals leaking over time?  I have seen warnings about storing
>> the 3-500's in a damp environment and I think a flood is as damp as it
>> gets. ;'>
>>
>> Randy.
>>
>> Randy E. Randall AB9GO
>> Network Engineer
>> UC Health
>> Randy.Randall at UCHealth.com
>> Phone 513-585-7146
>> Fax 513-585-7159
>>
>> -----Original Message-----
>> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
>> Behalf Of k7fm
>> Sent: Wednesday, May 11, 2011 8:59 AM
>> To: Rob Stampfli; amps at contesting.com
>> Subject: Re: [Amps] 3-1000 Amplifiers
>>
>> "Just curious:  I know you say the tube was not in the water, but would
>> an unenergized glass tube be damaged from being submerged in a flood
>> for a day or two? "
>>
>> Since the tube is in a vacuum, nothing inside will be hurt.  Perhaps the
>> big issue is that a big tube like the 3-1000 will try very hard to float
>> down the river, since it will not like being under water.  Sort of like the
>> Japanese fishing floats that used to wash up on the West Coast beaches.  So,
>> new original stock vacuum tubes in their original boxes are likely to go
>> away during a flood.
>>
>> If the tube remains, there could be corrosion of the tube base and plate

Unless the tube is in the water for an extended period and not dried off 
after removal then corrosion could be a problem.  Pins are *relatively* 
easy to solder back on the larger tubes. You do have dissimilar metals 
in a wet environment.


73

Roger (K8RI)
>> cap.
>>
>> 73,  Colin  K7FM
>>
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