I have a 4 channel version of it and i modified it to have front panel binding posts.
Its not as simple of a mod as on some other supplies as these ware never designed to have any sort of front panel connections. The front panel PCB just covers the button area, but there is some sheet metal bellow it that needs to be trimmed back a little to make room as well as the typical drill some holes in the front panel.
I have some photos of it somewhere.
I know its not the prettiest of mods but it works.
If you are using that 7V 5A range on it then yeah local sensing might be a good idea for for 3A and under sensing at the output terminals is more than good enough.
I didn't know that about the E3610A display update hack. Cool.
Hi Berni,
thank you for the inspiration. I did the same modification on a 6626A including binding posts for the sense leads.
The front panel labels are "film free waterslide decals" from sunnyscopa (ppt and pdf attached). The look is nice and the durability ok. A low-noise "Noctua NF-A12x25 PWM" replaced the original fan. It is wired directly to header P210 on the GPIB board leaving the PWM input open. The fan has about half the througput of the original one but is sufficient for the 6626A. The heat sinks of the 50W outputs did not raise above 40°C at 22°C ambient temperature with all four outputs shorted and delivering the maximum current.
Regards and all the best
Hans
Hey @German_Engineer mod inspired me as well to order the posts and I'll do the modification on my 6627A if the ever present Deutsche Adler will not confiscate them. The question is, does anybody know of a suitable silent fan because the always-on on, maximum speed, one is making way to much noise.
Also I want to add temperature drive speed control and eventually the output on/off switch (Option 750, see the attached PDF.
Also @German_Engineer, can I bribe you to print me a set of decals, if so, kindly please PM me.
Cheers,
DC1MC
Link to posts, they really loon nice:
https://www.aliexpress.com/item/32871905530.html?spm=a2g0o.store_pc_groupList.8148356.63.6c305068emoWQL
I really hate drilling holes in nice equipment, I've passed up gear more than once because some former owner had drilled holes in the front panel for some modification. How about just make a box that sits under, on top or next to the thing that has binding posts? You could even have the PSU up out of the way on a shelf above the bench with a little remote panel on or under the bench with binding posts in a convenient place.
Hi DC1MC, have fun with the mod.
The stickers are a bit tricky and I needed three loops until I got them right. I used "Film Free Waterslide Decal Paper Type M" (USD 8.90 for 10 sheets) and glue W2 (USD 6.00). I ordered the items directly from sunnyscopa in KR. Their website is perfect, Paypal, and the delivery took just a few days - much faster than aliexpress. They have some youtube videos describing the application. Unlike other waterslide decals, the film is removed at the end. Only the toner and the glue remains on the front panel. The result is very similar to the original print/silk screen. I think they are unique and are also good to repair front panels with rubbed-off markings.
Site: https://sunnyscopa.com/
Paper: https://sunnyscopa.com/collections/waterslide-decal-paper/products/filmfree-waterslide-decal-paper?variant=36426713727142
Glue: https://sunnyscopa.com/products/glue-w1-w2?variant=36426927734950
Tricky items: The paper needs to be printed mirrored on a laser printer. I managed this with ppt and a pdf printer driver from the "PDF-Xchange" toolset which has a mirror option. The printer driver did change the scaling slightly and I had to adjust it to preserve the holy 19mm spacing between the posts. Tip: Print first on paper and measure the distance between two posts. Grey color (some black pixels on white background) rubs off. It is better to print as much toner as possible (Black or any other saturated color, heavy paper, high quality setting of the printer). The stickers should be aligned with the bottom edge of the front panel. The rest is dexterity and patience for placing them at the correct position, wipe out the excess glue, heat with a hair dryer and let them dry. After a few trials they will be good. You can remove them with isopropanol and some ellbow grease without damaging the equipment. I did not dare to use acetone as the company recommends. I attach a ppt file with the stickers, so you can modify the labels to fit the 6627A. Just download and rename the extension to pptx (no virus, I hope).
Fan: I am happy with the noctua fan I mentioned in my post. Temperatures in the 6626A (150W total) are good. The 6627A has 160W , I believe, and should be OK as well. Sound level: 45dBA 50cm in front of the device and no disturbing resonances or harmonics. The 12V header can be located in the service manual. I bought a fan controller https://de.aliexpress.com/item/32973504131.html?spm=a2g0s.9042311.0.0.31a44c4d3LPhRu but did not try it since i need a good idea where to place the temp sensor. Anyhow, the power supply shuts down when it overheats and displays an error message according to the manual - so it is safe to experiment.
The next move in the beauty contest would be a backlight for the LCD anyone?