missing channels on DVB-T Waltham

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I noticed a while ago that I was missing a few channels on my DVB-T card.

I'm using the Waltham transmitter, and its not picking up BBC3, BBC4 and Virgin1. There may be some others but I haven't been through and made a definitive list.

I found an old frq file from a backup and it had the frequencies in it for BBC3 and BBC4, so I manually put the values in my live frq file and it can now receive them. I couldn't find the frequencies though for Virgin1.

I thought it might be because the predefinedDVBT.frq file might be missing some frequencies, but BBC1,BBC2 and BBC3 all have the same frq value.

The first 2 channels in my frq file are detected by Sage, but the BBC-THREE entry I had to put in manually.

CH:1 onid:9018 tsid:4102 sid:4166 frq:698000000 band:8 ctrl:1 #:BBC-ONE
CH:2 onid:9018 tsid:4102 sid:4230 frq:698000000 band:8 ctrl:1 #:BBC-TWO
CH:3 onid:9018 tsid:4102 sid:4351 frq:698000000 band:8 ctrl:1 #:BBC-THREE

Does anyone have any ideas on this?

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After all that, I was searching for something else and I think I've found the cure - the old scan when the channels transmitting.

Maybe I should have waited for the hangover to go before I posted!