Steve Anderson wrote:Thanks Harry, the CRT bit will be much as per the DG7-32 stuff I've done before. Nothing really new, why re-invent the wheel? I'll probably use the same circuits from years back...though the timebase speeds will need altering (easy). I'd have to check the grid/cathode arrangements which will now require 40-60kHz of bandwidth.
The largest chip will be a 28-pin DIL/DIP 0.3" device, no more difficult than wiring up two 7400s, the rest should be the more familiar 8/14/16/18-pin DIL/DIP parts. I will avoid SMD parts too.
Steve A.
Harry Dalek wrote:40 to 60 khz video in this bandwidth the converter changing the frame rate from 12.5 to 25 yes
Steve Anderson wrote:One of the other issues is dealing with off-frequency and/or erratic/wobbly line rates. It calls for a timebase corrector, no mean feat...
Steve A.
smeezekitty wrote:To be quite honest, at this point it is probably better to turn to software solutions at that point.
Harry Dalek wrote:Thanks to Andrew i have a DG7 32 as well...
Steve Anderson wrote:Harry Dalek wrote:Thanks to Andrew i have a DG7 32 as well...
Here's a datasheet for the DG7-32 that's new to me, though I have others, this seems more recent...but quite a large file!
Steve A.
Harry Dalek wrote:I recall reading you mentioned once its a dimmer CRT for NBTV ? , would like to do an all Valve monitor one day .
Harry, unless you have some valves/tubes now, look up at what an ECC83/12AX7 is gonna cost you now...the most basic, yet good audio amp, then the sockets for the same...sure you want to go all tube/valve? Somehow I doubt it...
Users browsing this forum: No registered users and 36 guests