Converting 405 line tapes to 625 - UK Vintage Radio Repair and Restoration Discussion Forum

Daviddean · 18th Sep 2018, 2:47 pm

Hi I am wondering if anyone out there has built an upconverter for 405 - 625 conversions, I know there are a few down converters, but no up converters. One problem is that the material is on half inch reel to reel and I do have the play back machines. Does anyone have a service manual for a Sony CV2000 I can look at?

AidanLunn · 18th Sep 2018, 6:43 pm

The best method would be optical conversion (a monitor displaying the material at 405 with a very slightly defocussed video camera pointing at it) unless you're a whizz with firmware, software and video card hardware. If you are, you could create an electronic computer-based upconverter of your own similar to the 625 to 405 downconverters that computer buffs on here have been discussing recently.

AidanLunn · 18th Sep 2018, 7:16 pm

Speaking of which there were a few 405 to 625 upconverters, but there was only a handful of these made and they were only available to broadcasters for archive maintenance. So it is technically possible electronically but as you have found out, there are none commercially available.

jayceebee · 18th Sep 2018, 7:46 pm

This subject has cropped up before. See this previous thread. https://www.vintage-radio.net/forum/...d.php?t=132946

peter_scott · 19th Sep 2018, 9:23 am

See: https://golbornevintageradio.co.uk/f...d.php?tid=7089

18th Sep 2018, 2:47 pm	#1
Daviddean Diode Join Date: Sep 2018 Location: Banbury, Oxfordshire, UK. Posts: 1	Converting 405 line tapes to 625 Hi I am wondering if anyone out there has built an upconverter for 405 - 625 conversions, I know there are a few down converters, but no up converters. One problem is that the material is on half inch reel to reel and I do have the play back machines. Does anyone have a service manual for a Sony CV2000 I can look at?

18th Sep 2018, 6:43 pm	#2
AidanLunn Heptode Join Date: Jan 2010 Location: Killamarsh, Sheffield, South Yorkshire, UK. Posts: 736	Re: Converting 405 line tapes to 625 The best method would be optical conversion (a monitor displaying the material at 405 with a very slightly defocussed video camera pointing at it) unless you're a whizz with firmware, software and video card hardware. If you are, you could create an electronic computer-based upconverter of your own similar to the 625 to 405 downconverters that computer buffs on here have been discussing recently.

18th Sep 2018, 7:16 pm	#3
AidanLunn Heptode Join Date: Jan 2010 Location: Killamarsh, Sheffield, South Yorkshire, UK. Posts: 736	Re: Converting 405 line tapes to 625 Speaking of which there were a few 405 to 625 upconverters, but there was only a handful of these made and they were only available to broadcasters for archive maintenance. So it is technically possible electronically but as you have found out, there are none commercially available.

18th Sep 2018, 7:46 pm	#4
jayceebee Hexode Join Date: Jun 2007 Location: Durham, County Durham, UK. Posts: 355	Re: Converting 405 line tapes to 625 This subject has cropped up before. See this previous thread. https://www.vintage-radio.net/forum/...d.php?t=132946

19th Sep 2018, 9:23 am	#5
peter_scott Nonode Join Date: May 2003 Location: Edinburgh, UK. Posts: 2,029	Re: Converting 405 line tapes to 625 See: https://golbornevintageradio.co.uk/f...d.php?tid=7089 __________________ http://www.nostalgiatech.co.uk http://uk.youtube.com/user/pmscott6135