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Forgestone 400

Pre War 240/405, Post War 405 Line, B&W Dual Standard, Colour Dual Standard, B&W S/S 625, Colour S/S 625 line, Hybrids. Standards converters & modulators, video recorders.
 
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Forgestone 400

Post by The_Teleman » Thu Aug 04, 2016 5:59 pm

image.jpeg
Forgestone 400
Here is an unusual set for the keen tv collectors .
It's kit set produced about 1973 using mainly solid state design with the exception of
2 valves in the line output stage ( PY500A & PL509 )
The set is not one of the prettiest sets in my opinion, although it's only the 22inch version it's rather large cabinet & mains transformer make is a bit on the heavy side
This set came with a set of panels that had never been made up & all the components to fit the PCBs in fact almost another complete set
The set is in working order now there was no picture when I got it
This was due to an o/c 1.5 meg resistor in the width circuit
All is needed now is a good setting up & should be an excellent example of quite an
Unusual set .
Attachments
image.jpeg
image.jpeg
Pcb's ready to make up
image.jpeg
image.jpeg
And components ready to fit
image.jpeg

 
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Re: Forgestone 400

Post by sideband » Thu Aug 04, 2016 6:04 pm

That looks pretty good! There can't be many of those around. Lets see a few shots of the innards!

 
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Re: Forgestone 400

Post by The_Teleman » Thu Aug 04, 2016 6:08 pm

This is the layout of the PCBs
Attachments
image.jpeg
image.jpeg
The rather large mains transformer
image.jpeg
The tuner & I/F PCs
image.jpeg
The decoder & RGD output
image.jpeg
The timebase pcb

 
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Re: Forgestone 400

Post by PYE625 » Thu Aug 04, 2016 6:44 pm

Very nice !!
From the front at first glance, it looks a bit PYE like.....and with the back cover in place, from the rear too.

 
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Re: Forgestone 400

Post by The_Teleman » Thu Aug 04, 2016 6:56 pm

That was my thoughts too , very PYE looking
But inside very different

Chris

 
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Re: Forgestone 400

Post by sideband » Thu Aug 04, 2016 7:20 pm

It looks very well built. Must have been a great construction project.

 
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Re: Forgestone 400

Post by jayceebee » Thu Aug 04, 2016 7:21 pm

PYE625 wrote:Very nice !!
From the front at first glance, it looks a bit PYE like.....and with the back cover in place, from the rear too.


I agree, looks very much like a CT205. Picture looks pretty good Chris.

Incidentally I used a Pye CT205 cabinet as a basis for the PT magazine project from the early 80's. This had a thyristor line timebase and had a problem I never quite solved. About 1 in 20 switch ons the line timebase would squeal loudly and the EHT and LOPT derived rails would be sky high. I'm sure someone at Philips must have built one and had the same issues, I'm certain this is where they got the idea for "Ambilight" as in a darkened room when the effect occurred the CRT heaters projected on to the wall behind the set. :aak

John.

 
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Re: Forgestone 400

Post by ntscuser » Thu Aug 04, 2016 7:29 pm

I like the simplicity and solidity of the Forgestone. :aad

 
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Re: Forgestone 400

Post by PYE625 » Thu Aug 04, 2016 8:33 pm

Imagine the excitement of obtaining a kit back in the day and spending each evening assembling it all piece by piece. dmm


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