armdnrdy1 wrote:Well...I had great luck with the last request for info on the MN3008 version of the AD-900. (Thanks Dirk)
modman wrote:You saved yourself some googling there! Well done!
I actually searched extensively on the net...and only posted the request here as a last resort. Luckily..it paid off!
armdnrdy1 wrote:So I thought I'd give it another go with something that I've been looking for a few years.
modman wrote:Why not? It's free!
Yes it is..this is a great site to gather and share information.
armdnrdy1 wrote:Does anyone have a trace side image of an ADA Final Phase?
modman wrote:Why do you need the trace side if there is a schematic available?
Why does anyone request a gut shot? It saves time in routing the board. The original routing is obviously verified as working. I also use gut shots to verify schematics. As you know...many schematics found on the net contain mistakes. I found a mistake on the Final Phase schematic...the board mounted "Sweep Modulation control was drawn incorrectly on the factory drawing.
armdnrdy1 wrote:I've periodically searched the net for years..and have come up with two grainy, blurry, useless images.
I'm not sure why people upload blurry pictures. Bad photographers?
One of the images isn't blurry but has a large piece of foam (factory installed) blocking the routing of four of the ICs. The jacks at the rear of the enclosure are blocking another three ICs. So...the image has very limited value.
The image in the thread that you linked is from the first version of the Final Phase. It is the original Vactrol version. (version 5 factory schematics) This version was made for a very short time. Vactrols are expensive...and to obtain the best results, have to be matched.
The version that I am working on is version 7. Version 7 & 9 (and the reissue) utilize two 4016s and a clock 4047 to achieve phasing. Unlike other phasers...nothing has to be matched!
I thought that instead of uploading questionable trace images...I would upload a full project when completed. I think that would be more appreciated. I have ordered parts and will report back when the build is verified.
There is one thing that I'm missing though...the set points for the clock. There is a test point connected to pin 10 (oscillator) of the 4047, and two trimmers that need to be adjusted (TR2, TR3) for the clock range and the max. clock frequency. Barring some "kind soul" popping in with some readings...I'll adjust it the best that I can by ear.