WayneD

Change your cover photo
WayneD
Change your cover photo
This user account status is Approved

Forum Replies Created

RE: 1978 Pye CT450 - Philips G11 Chassis

@sideband it really shows! I could certainly sense a bit of pride in the design and construction of it. I recall the Ferguson TX10 my Mother rented later seemed to be prone to ghosting (we lived quite...

In forum Colour Television

8 hours ago
RE: 1978 Pye CT450 - Philips G11 Chassis

The only thing I was unsure about was a slight buzz which isn't noticeable with the sound on but thinking back I'm sure the one that my parents had did exactly the same.

In forum Colour Television

9 hours ago
RE: 1978 Pye CT450 - Philips G11 Chassis

Well, finally got a few moments to put in a new TCA800 decoder chip and... Attachment : 20220808_193913.jpg Attachment : 20220808_194338.jpg Attachment : 20220808_194452.jpg DAMN!...

In forum Colour Television

10 hours ago
RE: 1978 Pye CT450 - Philips G11 Chassis

@crustytv I think I downloaded the G11 service manual before I joined this forum! I'd been looking for a Pye CT450 for years so I wanted to familiarise myself with them just in case I ever found one.

In forum Colour Television

5 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

Attachment : 20220804_124553.jpg Lifted the 47 ohm resistor so there's no load and the output of pin 3 is still the same. I removed and tested the 2.2uF capacitor next to it while I was desolderin...

In forum Colour Television

5 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

@cathovisor 2= 1.29 volts 4 = 1.98 volts 6 = 1.97 volts

In forum Colour Television

5 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

Right! Here we go. Testing the pins on the TCA800 we have: Pin 7 blue output = 4.4 volts Pin 5 green output = 3.9 volts Pin 3 red output = 1.3 volts (!) Pin 9 supply = 11.97 volts Pin 10 blue Y input ...

In forum Colour Television

5 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

@crustytv thank you so much for that! I have a G11 service manual that I downloaded a while back and I discovered a bit of a problem when trying to compare voltages: Attachment : Screenshot_202208...

In forum Colour Television

5 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

@pye625 yup, I think so. When I was a kid I used to mark boards with a different coloured permanent marker so I could easily identify each colour channel and test whilst it was powered on. I may have ...

In forum Colour Television

5 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

Been right through the decoder board, resoldered everything, including that 1617 control unit and done a continuity test on every track. Changed all the BF548 transistors (I had some in stock) and tes...

In forum Colour Television

5 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

Right! Unsoldered the red cathode pin as @malcscott suggested and the red disappeared so I swapped the red and blue over and blue is now problematic so I was indeed completely wrong about the heater t...

In forum Colour Television

6 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

@jayceebee I'm going to try swapping the red with another first. I originally thought it was a straightforward heater to cathode short but this is probably why it's best to ponder and get other people...

In forum Colour Television

6 days ago
RE: Amiga A500 (Mini)

@jayceebee A mate who makes music with Amigas calls one of their side projects "Varta Deathspill" for that very reason!

In forum Vintage Computers & Consoles

6 days ago
RE: 1978 Pye CT450 - Philips G11 Chassis

Someone had turned the red all the way down, presumably to hide the heater to cathode short on the red gun: Attachment : 20220802_165552.jpg Attachment : 20220802_165653.jpg Attachmen...

In forum Colour Television

7 days ago
Page 1 / 18