[Amps] 2K Classic X filament issue

[Martin Sole]

I'm with those who mentioned the socket clips. I had a similar problem 
on my 2K Classic X, full export, big transformer, ex UN (I'm told). A 
decent pair of pointed pliers should allow you to wriggle the clips off 
the socket pins. I swapped a couple of the grid pins with the two 
filament pins for both tubes and have not had a problem since.

My 2K also has the Johnson sockets and I'm not real impressed with them, 
especially with tubes than have the pin retaining ring. This blocks some 
of the socket holes and directs the airflow only through the centre 
spigot area and out across the pin seals. That might be a preferred 
solution but it seems it must be quite restrictive. I do have a pair of 
Chinese copy air-system style sockets, gifted to me by a very fine 
gentleman of this list, and once I have located the requisite "round 
tuit" I may fit them. I have a second 2K Classic that came to me as 90% 
complete and 20% messed with so they might go in that first to see 
before it gets the full 2x8877 conversion.

The big transformer allows about 3800v off load about 2kW out at full 
puff, staying within the Ia and Ig specs. I suspect these amps are even 
happier on 60Hz with cooler transformers and faster blowers.

Martin, HS0ZED




On 4/8/64 03:35, Donald Fox via Amps wrote:
> Many thanks for the replies, both on and off list. I'll take a harder look at the socket pins and connections. This is my 3rd Classic series console with 3-500's. The earlier 2 did not have such an issue.
>
> I'll report back what I find.
>
> Don
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