I'm looking for a compatible DC adapter for my old Radio Shack PC-2 Pocket PC, and an AC adapter for the Printer/Cassette interface.
1) The PC-2 manual states that power to the unit is from 4-AA batteries, or a 9V DC adapter. I have no idea how to correctly correlate the power ratings of the 4 AA 1.5v (4 x 1.5V = 6V) batteries to the requirements for the need 9V DC adapter. The units were actually built by Sharp which also marketed the pocket computer as the Sharp PC-1500. I found on a webpage that has the following information for the adapter, although the website appears to be located in the UK:
Power adapter for your PC-1500/CE-150 or IWS adapter
The requirements are :
– 9V
– 110v/220V
– plug dimensions 5.5mm x 2.1mm
– Negative inside, positive outside
Another site has this:
POWER SUPPLY 4 x AA 1.5V batteries, 50 hours run time (0.13W) - 6V DC external AC adaptor EA-150 (Sharp)
I also found a listing for a TRS-80 Pocket Computer PC-2 with the power adapter. I have attached a zoomed in photo of the adapter with power details.

When looking at the Jameco website for an adapter, I have no idea what to look for other than 9V, and I'm not sure if that is even correct.
2) The manual for the Printer/Cassette Interface is of little help, and neither are the lack of markings on the unit. The manual states that power is from the rechargeable Ni-CD battery pack, and that the power consumption of the unit is 5.2W (DC).
From what I've been able to see, the required adapter may also be the Sharp EA-150. I did find a listing on ebay Australia for the printer/cassette interface with a power supply with photos, but I can't clearly see the markings on the power adapter to make sure it's the same ratings, but the model is the EA-150 of which I thinks several types were made based on which country it was sold in. I emailed the seller and asked if he could tell me what the ratings and polarity are on the adapter.
Any help would be greatly appreciated!
1) The PC-2 manual states that power to the unit is from 4-AA batteries, or a 9V DC adapter. I have no idea how to correctly correlate the power ratings of the 4 AA 1.5v (4 x 1.5V = 6V) batteries to the requirements for the need 9V DC adapter. The units were actually built by Sharp which also marketed the pocket computer as the Sharp PC-1500. I found on a webpage that has the following information for the adapter, although the website appears to be located in the UK:
Power adapter for your PC-1500/CE-150 or IWS adapter
The requirements are :
– 9V
– 110v/220V
– plug dimensions 5.5mm x 2.1mm
– Negative inside, positive outside
Another site has this:
POWER SUPPLY 4 x AA 1.5V batteries, 50 hours run time (0.13W) - 6V DC external AC adaptor EA-150 (Sharp)
I also found a listing for a TRS-80 Pocket Computer PC-2 with the power adapter. I have attached a zoomed in photo of the adapter with power details.

When looking at the Jameco website for an adapter, I have no idea what to look for other than 9V, and I'm not sure if that is even correct.
2) The manual for the Printer/Cassette Interface is of little help, and neither are the lack of markings on the unit. The manual states that power is from the rechargeable Ni-CD battery pack, and that the power consumption of the unit is 5.2W (DC).
From what I've been able to see, the required adapter may also be the Sharp EA-150. I did find a listing on ebay Australia for the printer/cassette interface with a power supply with photos, but I can't clearly see the markings on the power adapter to make sure it's the same ratings, but the model is the EA-150 of which I thinks several types were made based on which country it was sold in. I emailed the seller and asked if he could tell me what the ratings and polarity are on the adapter.
Any help would be greatly appreciated!