Multi-burst source

Ideas, technical topics, help and discussion for ATV enthusiasts
Forum rules
This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.

Thank you
Post Reply
g4bbh
Posts: 74
Joined: Thu Mar 13, 2008 7:19 pm

Multi-burst source

Post by g4bbh » Fri Mar 28, 2008 10:58 am

To help get my pre/de-emphasis right I wanted a multi-burst source. Using the PC did not help as the composite output is far from flat above 3 MHz. Although not quite correct I am having to feed the TX with a manually swept 1-6 MHz signal which is OK for bench tests but not for day-to-day system checks.
There was a circuit in CQ-TV 178 that used a MAX038 chip to do the frequency generation but this chip is obsolete and no longer available in UK and very pricey from USA. An even older design in CQ-TV 80 in impractical as it required separate L-C oscillators for each frequency.

So does anyone know of a (simple) design for a multi-burst generator?

Dick G4BBH

Hope you all bring plenty of old but useful video bits to the B&B at Kempton Park next week........
Top
Post Reply

Return to “General ATV Discussion”