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Old 19th May 2017, 2:09 pm   #50
dtvmcdonald
Pentode
 
Join Date: Mar 2016
Location: Champaign, Illinois, USA.
Posts: 227
Default Re: Marconi 702 advice

When there is no video on my aurora, it outputs standard NTSC color bars,
converted to whatever is output.

As to alignment ... I worked very hard. One setting however is frozen and
PB_Blaster has not yet worked, it can take a week. Still, its actually
quite wide, 2.5 MHz is much less than 6 dB down. It is also the focus, especially
with push-about activated. I think I need to check R30 and R31 because best focus,
while very broad, is all the way down.

If I redo, what should it look like? There are pictures in the omnibus, but
they look awful. I do not know if I have the "transformer". My response is a
bit double-humped.

Do you know the impedance of the speaker? It seems to be very low,
or perhaps shorted. I cannot do more on the audio without a good MHD4.
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