UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Television Standards Converters, Modulators etc

Notices

Television Standards Converters, Modulators etc Standards converters, modulators anything else for providing signals to vintage televisions.

Reply
 
Thread Tools
Old 17th Jun 2019, 8:59 am   #181
FRANK.C
Heptode
 
FRANK.C's Avatar
 
Join Date: Feb 2006
Location: Roscommon, Ireland
Posts: 592
Default Re: Hedghog standards converter

Hi Taz
Thanks for the better picture.
it is something that I can keep in mind if I am updating the firmware again. I will need to look into it further.

Frank
__________________
FRANK.C is offline   Reply With Quote
Old 18th Jun 2019, 3:56 pm   #182
Tazman1966
Nonode
 
Tazman1966's Avatar
 
Join Date: May 2006
Location: St Albans, Herts, UK.
Posts: 2,018
Default Re: Hedghog standards converter

Thanks Frank
__________________
All the very best,
Tas
Tazman1966 is offline   Reply With Quote
Old 19th Jun 2019, 8:38 pm   #183
volte-face
Pentode
 
Join Date: Oct 2015
Location: Middlesex, UK.
Posts: 184
Default Re: Hedghog standards converter

Ah, I recognise that photo!

Below is a picture, taken at the time, of the 'scope trace of that actual ITS line (line 13 / 215) from the actual generator that was used to feed the actual television in that actual picture, in case it helps at all.
Attached Thumbnails
Click image for larger version

Name:	405_its.jpg
Views:	72
Size:	103.7 KB
ID:	185389  
volte-face is offline   Reply With Quote
Old Today, 6:37 pm   #184
Superscope
Pentode
 
Join Date: May 2017
Location: St Austell, Cornwall, UK.
Posts: 172
Default Re: Hedghog standards converter

I have an interesting problem with my Hedghog and wondered if anybody on the Forum
might have some ideas?

Can't seem to get a clean Picture at all.
Looks like the Video is extremely noisy and the TV's I've tried look like they
are struggling to Sync properly, some can't display anything sensible at all.

Stephen (Freya) has very kindly retested the HH and found no faults at all!

All my VHF TV's are mid 70's Portables and all are Uk Models and none of them
will display a clean Picture and most won't display anything viewable!

TV's tested from my collection are:
JVC 3050Uk Only Noise but clearly a signal of sorts is present
JVC CX-500GB Very Poor, just able to make out Test Card.
JVC CX-60GB Displays the best Picture, but very noisy.
JVC P100-UK Only Noise but clearly a signal of sorts is present
Crown 5TV-65R Just able to make out Test Card
Crown 5TV-525R Only Noise but clearly a signal of sorts is present

Stephen asked if the TV's were 625 Line?

I wasn't aware any VHF transmissions in the Uk were 625 Line, can anybody tell
me if the Uk used VHF 625 Line and if they did, when did this happen?

I know using VHF 625 Line was considered before the UHF 625 Line system was
established, but can't see any mention that is was ever used, having opted instead
for duplicate BBC1 and ITV on VHF and UHF.

Ian
Superscope is online now   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 6:38 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright ©2002 - 2019, Paul Stenning.