The BI PI a DATV TX based on the U2790B modulator.
Next step is to getting it driving my 1296mhz, 5.7ghz and 10ghz transverters.
Wayne VK5BI
Poor mans Portsdown
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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.
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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
Poor mans Portsdown
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Re: Poor mans Portsdown
Hi Wayne
Great idea! Do you simply switch in appropriate LC filters for the IQ signals?
It would be good if you could publicise the circuit design to allow others to follow suit.
Dave, G8GKQ
Great idea! Do you simply switch in appropriate LC filters for the IQ signals?
It would be good if you could publicise the circuit design to allow others to follow suit.
Dave, G8GKQ
Re: Poor mans Portsdown
Thanks Dave,
the IQ filtering if done with 2 of the boards from the digilite era in CQ-TV252. These are switched with the 4 pole toggle switches.
Photo of the very rough looking modulator board below.
Wayne VK5BI
the IQ filtering if done with 2 of the boards from the digilite era in CQ-TV252. These are switched with the 4 pole toggle switches.
Photo of the very rough looking modulator board below.
Wayne VK5BI
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