Sockets are here.
http://shop.ebay.com/nepeke25/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p4340
They are the best you will ever see. Superb quality.
73, Alek.
At 06:03 AM 10/09/2010, Marius Hauki wrote:
>Hi, I am working on a new GS35B HF amp design.
>
>Some questions:
>
>-I would like to buy some sockets instead of machining them myself.
>Could you gentlemen direct me to a person selling sockets that
>normally have them in stock or at least can deliver within a month or
>so?
>
>-What is the proper "burn in" procedure for the GS35B? I was planning
>on running the filament of the tube for some time (how long time?)
>with proper airflow. Do I need to apply HV as well? I don't have a HV
>tester at the moment. I bought the tubes from UR4RLL. They look new /
>unused.
>
>-I am planning to use the triode control board from WD7S. Any things
>that I should be specially aware of when using that board with the
>GS35B (apart from the mod for higher bias voltage)?
>
>-I am planning 3650V on the anode. This is significantly higher than
>the "official" data sheets state, however I notice that the official
>data sheets rate the tube for military service with less cooling. Does
>3650V look like an OK voltage?
>
>-I am looking for a SAFE way of running the HV cable from an external
>HV PSU cabinet to the RF cabinet. I know this has been discussed
>numerous times before, but again: what is the best cable I can use and
>what connector should I use? Did we reach a conclusion and some
>reccomendation on that question? I would like to avoid any possibility
>at all for the B+ (hv plus)connector connecting before the B- (hv
>minus) because that may place the RF deck at the HV+ potential if the
>grounding between the two boxes are broken. (I do not plan on hot
>plugging, of course). The minus lead should be isolated from the
>chassis since I plan on using a high wattage drop resistor from
>chassis ground to B- to be able to measure grid current.
>
>-Should I place the grid drop resistor in the PSU cabinet or in the PA
>deck? I was thinking that placing it in the PA deck would be safer
>because in case only B+ is connected before B-, the grid drop resistor
>would connect B- to chassis ground and not keep the PA deck at B+
>potential (No I am not going to hot plug the B+ connector, but perhaps
>some other operator will attempt just that. You never know what can
>happen in the mid of a contest battle)
>
>-I have read that running DC instead of AC on the filament is OK.
>However I have read somewhere else that it is not OK. I have an AC
>trafo, but if the primary voltage varies, the filament voltage could
>be too high or too low and this may hurt the tube. Instead I would run
>a regulated DC supply, since the filament current is not that high.
>Any comments on that? Alternatively, any clever way of regulating the
>trafo by a small series drop resistor or something?
>
>73
>LB3HC
>Marius
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