Fixing a GEC BT 302 Television - Page 15 - UK Vintage Radio Repair and Restoration Discussion Forum

Simon Gittins · 18th May 2020, 8:04 pm

This type of capacitor (not an electrolytic type) can be fitted either way round.

As already suggested, fit them so that the value can be seen.

deepspacedaz · 18th May 2020, 8:12 pm

Ok John thanks again sorry I get bit confused,

deepspacedaz · 18th May 2020, 8:22 pm

First ones in

Heatercathodeshort · 18th May 2020, 8:40 pm

That's the correct way Daz.
Just for future reference, R98 is the cathode bias resistor and looks a bit cooked. It's rough condition will not prevent the frame stage from working so that can be dealt with later. It's value is 300 ohms which is a non standard value.
I fitted a 330 ohm in mine and as you can see, it is OK. Just carry on with the cap replacements but take care! John.

deepspacedaz · 18th May 2020, 9:30 pm

Here we are so far

Station X · 18th May 2020, 9:36 pm

It would help if the values were visible or perhaps in focus. Then members would know if you've fitted the right value caps in the right places. Could save a lot of bother later on.

deepspacedaz · 18th May 2020, 9:44 pm

Ok ill zoom in

deepspacedaz · 18th May 2020, 9:46 pm

The 2 top ones one are 0.1 uf

deepspacedaz · 18th May 2020, 9:50 pm

and the other 2 a 0.0047

deepspacedaz · 18th May 2020, 10:00 pm

One of the campictors is 0.02. I have a 0.22, is this one correct

Station X · 18th May 2020, 10:02 pm

You'll need to specify units uF? nF?

deepspacedaz · 18th May 2020, 10:05 pm

Oh sorry UF

Station X · 18th May 2020, 10:08 pm

Going back to post #211, C115 is 0.02uF or 20nF. Replacement would be 0.022uF or 22nF.

You cannot replace this with 0.22uF.

deepspacedaz · 18th May 2020, 11:34 pm

Job done apart from one comp, C115, I only have 2 comps left 0.47 uf
0.22 uf

Station X · 18th May 2020, 11:41 pm

I don't see why you have either of those values. See post #211.

deepspacedaz · 18th May 2020, 11:51 pm

Everything else is correct, one missing.

deepspacedaz · 18th May 2020, 11:58 pm

What we have so far

deepspacedaz · 19th May 2020, 12:12 am

Gonna get some kip night all

bionicmerlin · 19th May 2020, 12:45 am

I thought it was suggested the components were put in with the value showing

Station X · 19th May 2020, 7:37 am

Quote:

Originally Posted by bionicmerlin

I thought it was suggested the components were put in with the value showing

Three times I think!

18th May 2020, 8:04 pm	#281
Simon Gittins Heptode Join Date: Jan 2006 Location: Cornwall, UK. Posts: 506	Re: Fixing a GEC BT 302 Television This type of capacitor (not an electrolytic type) can be fitted either way round. As already suggested, fit them so that the value can be seen.

18th May 2020, 8:12 pm	#282
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television Ok John thanks again sorry I get bit confused,

18th May 2020, 8:22 pm	#283
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television First ones in Attached Thumbnails

18th May 2020, 8:40 pm	#284
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Fixing a GEC BT 302 Television That's the correct way Daz. Just for future reference, R98 is the cathode bias resistor and looks a bit cooked. It's rough condition will not prevent the frame stage from working so that can be dealt with later. It's value is 300 ohms which is a non standard value. I fitted a 330 ohm in mine and as you can see, it is OK. Just carry on with the cap replacements but take care! John.

18th May 2020, 9:30 pm	#285
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television Here we are so far Attached Thumbnails

18th May 2020, 9:36 pm	#286
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Fixing a GEC BT 302 Television It would help if the values were visible or perhaps in focus. Then members would know if you've fitted the right value caps in the right places. Could save a lot of bother later on. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2020, 9:44 pm	#287
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television Ok ill zoom in

18th May 2020, 9:46 pm	#288
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television The 2 top ones one are 0.1 uf

18th May 2020, 9:50 pm	#289
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television and the other 2 a 0.0047

18th May 2020, 10:00 pm	#290
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television One of the campictors is 0.02. I have a 0.22, is this one correct

18th May 2020, 10:02 pm	#291
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Fixing a GEC BT 302 Television You'll need to specify units uF? nF? __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2020, 10:05 pm	#292
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television Oh sorry UF

18th May 2020, 10:08 pm	#293
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Fixing a GEC BT 302 Television Going back to post #211, C115 is 0.02uF or 20nF. Replacement would be 0.022uF or 22nF. You cannot replace this with 0.22uF. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2020, 11:34 pm	#294
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television Job done apart from one comp, C115, I only have 2 comps left 0.47 uf 0.22 uf

18th May 2020, 11:41 pm	#295
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: Fixing a GEC BT 302 Television I don't see why you have either of those values. See post #211. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

18th May 2020, 11:51 pm	#296
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television Everything else is correct, one missing.

18th May 2020, 11:58 pm	#297
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television What we have so far Attached Thumbnails

19th May 2020, 12:12 am	#298
deepspacedaz Hexode Join Date: May 2020 Location: Matlock, Derbyshire, UK. Posts: 461	Re: Fixing a GEC BT 302 Television Gonna get some kip night all

19th May 2020, 12:45 am	#299
bionicmerlin Heptode Join Date: May 2010 Location: Warminster, Wiltshire, UK. Posts: 682	Re: Fixing a GEC BT 302 Television I thought it was suggested the components were put in with the value showing __________________ I bet that car doesn't have a suppressor.