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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 23rd Mar 2022, 2:09 pm   #1
3CX15000A7
Tetrode
 
Join Date: Dec 2019
Location: Bergen op Zoom, Netherlands
Posts: 65
Default Difference between Philips tubes?

Hi all,

From the EAK series, there are a lot of different types:

EAK051X11
EAK071X11
EAK222X13
EAK251X13
EAK552X11

I know that the 051/071 were the lower end (non blackline) types. Also the X number specifies the yoke. The 222, 251 and 552 are blackline types, where the 552 is the most modern one.

Does someone know what the exact differences are between these blackline ones? Can you swap those? Maybe I want to replace a 222X13 with a 552X11. Will give the difference X13/X11 also a problem?
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Old 24th Mar 2022, 12:13 am   #2
Maarten
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Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,175
Default Re: Difference between Philips tubes?

As a working hypothesis I'd assume X11 versus X13 is a problem (different resistance and induction of one or both deflection coil sets), but 222 versus 552 isn't.
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