What's another good plugin to get for a 544 with 1A1?


John Griessen
 

I lucked onto a 544 advertised in the Santa Fe craigslist.
The 1A1 seems good for most use cases. mine is "The third model, from ??? until the end has four-sided V/cm knobs and a FET front-end."
https://www.ecosensory.com/tek/box_LG025-J1-tek-544-1a1.jpg

1A4 seems good for emulating Jim Williams with lots of traces displayed...

1A5 seems like a fine one, and can use the P6046 diff probes, (but I'd have to do the cal for P6046, which is long and detailed, and I have P6046's already matched to amps that stay together and work in any scope.)

1A7A would be nice -- same features as 7A22, more sensitive than the 1A1...


Sean Turner
 

John,

There's also the Type 1A2 that is roughly the same thing as a Type CA in terms of functionality (quite a bit wider bandwidth though). I have one that came with my Type 547 estate sale find, and I'm really not using it much. Would consider a trade for other stuff. :o)

Sean

On Sat, Jul 17, 2021 at 04:21 PM, John Griessen wrote:


lucked onto a 544 advertised in the Santa Fe craigslist.
The 1A1 seems good for most use cases. mine is "The third model, from ???
until the end has four-sided V/cm knobs and a FET front-end."
https://www.ecosensory.com/tek/box_LG025-J1-tek-544-1a1.jpg

1A4 seems good for emulating Jim Williams with lots of traces displayed...

1A5 seems like a fine one, and can use the P6046 diff probes, (but I'd have to
do the cal for P6046, which is long and detailed, and I have P6046's already
matched to amps that stay together and work in any scope.)

1A7A would be nice -- same features as 7A22, more sensitive than the 1A1...


snapdiode <snapdiode@...>
 

1A4 is nice but needs some care, the large amount of wafer contacts need cleaning, and there's a lot of point-to-point wiring that can go bad. I even had a joint that was not soldered from the factory. Also it contains rare dual JFETs, and the overall design is difficult to repair and easy to damage, there's 4 channels crammed into that plugin. Maybe a nice 1S1.

But the days of trawling eBay for low price plugins were 10+ years ago. Prices are absurdly high now.


Keith
 

re: Ebay sky high.


I almost hate to rub it in, but did you see the link I put up the other day, from eBay? A fellow in Corona California selling six plug in modules he had gotten from a storage unit purchase. He had very little idea what he had. He sold them for $25 - for all six!

Sadly, the auction was almost over when I first found it and it ended at a weird time too, but I did throw it up on the forum in hopes that someone here would get it.

So I reckon there are still a few plug-in bargains, even on fleabay, but yeah not like ten years ago for sure.


Cheers

Keith