PPS I wouldn't do this to a rare or pristine old TV but the P1 is neither of those I suspect!

I'm so bored here, the brain won't stop!

To allow channel up/down scan, use channel 0 (coded 1) for Down, channel 11 (coded 13) for Up.
The program would send Up or Down codes to the STB every 5 seconds or so while these"channels" were selected. The blank in between 1 and 11 (I think there is a blank position?) would automatically code as 0 and would stop the scan.

All this is quite easy to program, the programming environment for the card has timers, variables and maths functions. The macro to do all this could be coded in less than 50 lines of code, assuming the use of a lookup table for the channels and 14 entries in the table.

Robbbert:

I can swing by your place some time this week after work.
Only problem is, I can't find my stash of high voltage electros. If I remember correctly, they were 47μF 450V pigtail types, just the thing for restoring old radios. The usually turn up when I'm looking for something else I have found a huge bag of 100μF 100V electros, not terribly useful I know.
I've also found all sorts of stuff I'd forgotten I had. Do you want a couple of spare multimeters, digital, Analog or both?
I've even got DSE multimeter kits for the diehard enthusiast. New TV tuner modules, RF modulators, about 1,000 red am transistor radio oscillator coils (they were apparently used in some DSE project or another).
What sort of valves were you after? I think most of mine are TV set types.
I've also got a box of toroidal transformers of various sorts, plus 240V to 110V and 240V to 220V transformers, all boxed with plug and socket.
I've only just remembered where I put all my polyester capacitors, so I'll have a look at that tomorrow.

I'll list everything I may need, hopefully you have something that matches.

1. Speaker transformers. I've got a few sets waiting for replacement transformers.

2. Magic eye tubes, especially 6U5G, but I'll take any.

3. High voltage caps (450v or higher).

4. Random radio tubes.

1. Speaker transformers. I've got a few sets waiting for replacement transformers.

Sorry, those are very thin on the ground.

But here's what you need

http://www.ebay.com/itm/2-PP-100W-Tube-Output-Transformer-KT88-EL34-KT-88-/370107315069

You'd think there'd be at least ONE transformer manufacturer in all of China who could make small single-ended 5K to 3 Ohm speaker transformers for the vintage radio market! It's not a huge market, but Jaycar still manage to get transistor radio oscillator and IF coil sets made....

You can of course, re-wind them yourself. I've done it by simply unwinding the primary wire off a mains transformer straight onto the audio transformer bobbin. I used to use a hand-cranked drill for the winding, because that way you could work out how many times the chuck turns per revolution of the crank. That way you just count how many cranks it takes to unwind it, and then crank the same number of times to re-wind it.

http://www.ebay.com/itm/2-PP-100W-Tube-Output-Transformer-KT88-EL34-KT-88-/370107315069

$2000 per transformer? Umm.... I don't think so.

Nearly $300 for postage. Do those things hang on power poles or what?

Some of the postage charges from the USA defy belief!

I can get 10 2N5485 JFETS for $3.25 including postage from China, or ONE 2N5485 for $1.95 from the USA plus $49.31 postage!!

On the other hand, for those who must have the best:

http://www.higherfi.com/pix100k/ultrasound_Otello.jpg

A snip at US$600,000!

If they sell one, maybe they could spend some of it on a better website:
http://www.ultrasound-hifi.com/

I could be mistaken, but it looks like a pile of 6CM5 line output valves run in parallel...