Message #3 Posted by Glynn on 12 July 2000, 12:01 p.m.,
in response to message #2 by Don Williams
Sorry, Don, that was my first post here and I thought I had read quite a lot on the HP75D before I bid on it, BUT that was a little gotcha I missed (odd peripheral, that pod).
Now that I search back to March 17, yes, I see it, thank you. Guess that means I should not have expected a module cover nor a battery door, either. ;-) And I didn't get a barcode wand... would anyone happen to know the model number of Wand to look for?
Back to my original question: does anyone happen to have a schematic, transistor i.d. chart, or any idea what that one potentiometer adjusts?
The wires may have led to a jack on the pod--- that's fine. I still need info on repairing this to 75D NON-POD status.
If they put a jack on the pod, did they sell a HP Outboard Speaker Unit?
BTW, the modem is in the pod itself. There are no changes, as far as I can tell, to the HP75D other than emasculating the speaker. I was a little taken aback by this, it seemed rather kludgey compared to what I've seen of other HP preipherals (that hole drilled on its side, etc).
The speaker I chose from Radio Shack was a dynamic 8-ohm job, primarily because it looked a lot like the internal shot in the Museum's photo collection, but also because the manual for the unit mentions it can reproduce 100-1400 Hz well, but draws a lot from the battery below 100 Hz. I see someone mentions a piezo speaker in the thread where this was discussed earlier-- I'll give one a try just to see if the volume improves.
A piece of aluminum, cut to size, is operating admirably to hold the battery pack in tight. As you can tell, this is for use, not a glass case. The annunciator function is rather important to me.
Thanks for all.