Hi, lordsmurf. Thanks for the input. I figured that good post-processing was necessary. The priority is definitely to capture and preserve as much of the best quality video as possible so speeding up the process is a bad idea.
The following screen shots were taken from some .avis captured uncompressed using
Virtualdub with a Pinnacle s-video PCI card and JVC SRS365U in AUTO and SVHS mode.
JVC_SRS365U_SVHS_AUTO.jpg
This a screen cap of part of the video. From what I have read about it online, the image seems to exhibit the infamous JVC "comet" issue.
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Here is another screen cap of the same tape taken immediately after a cleaning of the video heads using a PreSat 99% IPA-soaked foam swab. The comets disappeared only to return almost immediately after this video was taken. My guess is that the static electricity accumulated between the upper and lower drums of the video head that is said to cause this issue was temporarily dissipated during the cleaning. It only took minutes of operation for the static to return.
JVC_SRS365U_SVHS_AUTO_after_cleaning.jpg
For comparison, here is a screen cap from a video of the same tape recorded from a JVC HRS5901U in SVHS and AUTO mode. I can immediately see the difference in quality between the VCRs.
So now I want to try to repair the JVC SRS365U. From the service manual, I see the static brush assembly pdm4440a is the part in question. It seems to be available from many suppliers online for about $6.05. Will a replacement brush solve the problem at least for an extended period of time sufficient to capture these tapes? Maybe cleaning the existing brush will suffice?
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JVC_HRS5901U_SVHS_AUTO.jpg
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ScreenHunter_67 Aug. 24 17.05.jpg
I see that a realignment is necessary after disassembling the video head. I have experience with an oscilloscope and access to the necessary cables. However, I have no idea how to obtain this MHP alignment tape. It doesn't seem to be sold anywhere.