UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Argus25 · 8th Mar 2018, 11:08 pm

Keith,

It's pretty difficult for you to restore your set without a nice stable known good 405 line signal source.

The three sources I have available are from a Dinosaur standards converter, Richard Russell's programmable testcard generator and The Jon Evans testcard generator (which is a good one to whip up)

I have not tried the Modeline yet, but I intend to.

It might save you some time and a headache if you get or borrow a known good 405 source (preferably with an RF modulator), then get your TV restored, then you can use the TV as a known good 405 line "monitor" to iron out the bugs in the Modeline.

It's hard to tell looking at the screen images what proportion of the problem is coming from the abnormal signal and if any set faults in the TV22 are contributing.

Hugo.

8th Mar 2018, 11:08 pm	#31
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: Bush TV22 restoration Keith, It's pretty difficult for you to restore your set without a nice stable known good 405 line signal source. The three sources I have available are from a Dinosaur standards converter, Richard Russell's programmable testcard generator and The Jon Evans testcard generator (which is a good one to whip up) I have not tried the Modeline yet, but I intend to. It might save you some time and a headache if you get or borrow a known good 405 source (preferably with an RF modulator), then get your TV restored, then you can use the TV as a known good 405 line "monitor" to iron out the bugs in the Modeline. It's hard to tell looking at the screen images what proportion of the problem is coming from the abnormal signal and if any set faults in the TV22 are contributing. Hugo.