Seems to me there is a free ware drawing program for Windows that does the same thing. I may have it on this machine, will look.
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On 6/24/2022 1:48 PM, Gary Follett wrote:
I put schematics into Photoshop and stitch them together into one large readable page. I then use the ¡°Select Rectangle¡± tool to follow a given line in the schematic and highlight various lines in different colors. However, the schematic needs to be straight for this to work and there is no simple way to do diagonal traces.
Once I have a circuit fully mapped out, I upload it to my iPad and take that to the bench for circuit tracing.
This works REALLY well because I have the full circuit, zoomable at very high resolution, with the offending circuit fully traced out in color!
If I had Visio on the MAC I would use that instead because that is a drawing program, not a photo editing program so you can follow any angle and highlight any trace in any color. You simply import the stitched schematic into Visio as an image and you are good to go. You can just draw right over the image.
Gary
W0DVN
On Jun 24, 2022, at 3:40 PM, Richard Knoppow <1oldlens1@...> wrote:
I have the same problem with the way rotary switches are presented on Drake schematics. If possible have a large size print made of the schematic and use colored pencils or a hi-liter to trace through the connections. I use the same technique on other schematics that look like maps of a freight yard.
On 6/24/2022 1:04 PM, wb6ogd wrote:
Steve,
Sorry, I was looking at my R-4B schematic.
Disclaimer.. I am somewhat "Drake rotary switch" challenged...
The way I think it works is...
Power for the BFO or the AM detector comes from R130.
When the BFO should be on, this power is switched to T11/C163.
When in AM, power from R130 gets switched to R116.
So, I would check for voltage at T11 with the switch rotated.
C188 seems to be added to the same BFO circuit in the R-4B.
It decouples the exact node you propose to put a 1K to ground!!
Might be something Drake discovered in later models??
Also, schematic 919664054 seems to have a big error in the BFO, my downloaded from somewhere
copy has the correction marked in, that makes it like the R-4B schematic (the emitter connects to C163).
73,
Gary
WB6OGD
--
Richard Knoppow
1oldlens1@...
WB6KBL
--
Richard Knoppow
1oldlens1@...
WB6KBL
