Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Old November 2nd 06, 02:28 PM posted to sci.electronics.repair
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Default Modulator PAL B/G 6.5 MHZ sound spacing to B/G 5.5 or 6 Mhz s. spacing

I have a small broadcast CABLE tv system. Using 12 Modulators
which accept 12 Audio /Video signals and output composite RF signal.
Each RF output of each Modulator will then feed a signal mixer. So
there are 12 channels. The system is PAL B/G with 6.5 sound spacing.
The problem is that most of the users have only PAL B/G 6 mhz
Televisions. So the users can get the video picture but no sound OR
SOUND WITH TERRIBLE HUMMING
Question is how I can tune the modulator with 6.5 mhz of sound spacing
TO SOUND SPACING 5.5 OR 6 MHZ.

PETER


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Old November 6th 06, 09:38 AM posted to sci.electronics.repair
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Default Modulator PAL B/G 6.5 MHZ sound spacing to B/G 5.5 or 6 Mhz s. spacing

B,
tks for your reply.
Yes, The modulator is Pal B/G with 6.5 MHZ sound sub carrier. I need to
make it back to Pal B/G WITH 6 MHZ SOUND SUB CARRIER.
the modulators are ordered mistakenly with sound carrier 6.5 mhz apart
from the video signal.
I now need to tune it back to make it work in a country where the tv
are pal b/g 5.5 or 6 mhz sound carrier.
peter
b wrote:
ha escrito:

I have a small broadcast CABLE tv system. Using 12 Modulators
which accept 12 Audio /Video signals and output composite RF signal.
Each RF output of each Modulator will then feed a signal mixer. So
there are 12 channels. The system is PAL B/G with 6.5 sound spacing.
The problem is that most of the users have only PAL B/G 6 mhz
Televisions. So the users can get the video picture but no sound OR
SOUND WITH TERRIBLE HUMMING
Question is how I can tune the modulator with 6.5 mhz of sound spacing
TO SOUND SPACING 5.5 OR 6 MHZ.

PETER


If you are talking about the audio carrier, Pal BG is 5.5mhz and Pal I
is 6mhz. There is no such thing as a ' Pal BG 6mhz
telvision'....perhaps you need to rephrase your question, as it doesn't
seem to make sense.
-B.


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Old November 6th 06, 12:49 PM posted to sci.electronics.repair
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Default Modulator PAL B/G 6.5 MHZ sound spacing to B/G 5.5 or 6 Mhz s. spacing


wrote:
B,
tks for your reply.
Yes, The modulator is Pal B/G with 6.5 MHZ sound sub carrier. I need to
make it back to Pal B/G WITH 6 MHZ SOUND SUB CARRIER.


.....6.0 ? 6.5? that's *not* pal B-G!!!

pal D is 6.5
pal I is 6.0

what you mean to say is that you're trying to adapt a pal- D device to
a pal-I.
Usually this involves changing a few coils.

-B.



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