Uniden Home Patrol 1

[csmith7585]

I recently purchased the Uniden Home Patrol Scanner. I have always been a scanner enthusiast as well as a police officer and a first responder. I have hooked a brand new uniden esp20 external speaker and a motorola external speaker to both audio jacks and cannot get any results whatsoever. Does anyone have any suggestions as to why I cannot get any audio or what type of external speaker I need to purchase to receive great audio when I am mobile ?

 

[UPMan]

1) The jack in the scanner is wired stereo (so that it will work with headphones/earbuds). ESP20 has a mono plug, which is going to short out 1/2 of the audio amplifier. You need to use a stereo plug (RS sells mono-->stereo converters).

2) The output level from the jack is suitable for headphones (i.e. very low). While an external speaker (with a stereo plug) will work, you will get better results from an amplified speaker.

 

[bfpdb]

I tried amp speakers and all i got was a constant Hum. Is there any help for the audio?

 

[kruser]

I tried amp speakers and all i got was a constant Hum. Is there any help for the audio?

Sounds like you have a ground loop in your audio path.
What happens when you unplug the AC adapter from the HP-1 so it is running on its batteries, does the hum stop?

I've used a Motorola amplified speaker as well as the one that RadioShack sells with my HP-1 and have been lucky and not had any gound loop hum.

If unplugging the HP-1's ac adapter does stop the hum, make sure the power for the amplified speaker and the HP-1 wall wart are plugged into the same power strip if you are using this setup indoor from AC power.

How are you running this now, I mean in a mobile setup or indoors.
If indoors, what powers the amplified speaker?

edit: you could also have a faulty cable between the amplified speaker and the HP-1. An oepn ground on that cable will introduce hum. Are you using a stereo adapter at the HP-1 end?
If your amplified speaker just has a mono plug, get the stereo plug to mono jack as UPMan suggested. It is needed and radioshack sells them.

What make is your amplified speaker?

 

[southwind]

Mismatch

I tried amp speakers and all i got was a constant Hum. Is there any help for the audio?

I had the same problem with HP1. The RCA WHP141 wireless headset I was using had a hum and low audio if plugged into the phone out jack. I bought a 3.5 to 2.5 mm stereo adapter from RS and used the line out. Solved my problem. 73's

 

[Sydney472]

Any Advice for A Motorola Amplified Speaker Hum

I got a Motorola Amplified Speaker and hooked everything up and it worked fine in the shop with very loud power and no interference. Took it to my car and plugged it in and got a constant hum, popping noise etc, and I couldn't even use it. One end was plugged into 12v cig lighter plug and the other into my scanner. Got a continuous engine interference, hum, popping everything. Any advice?

 

[radio17]

I'd just like to remind everyone that most modern cars and trucks have an auxiliary input jack on the radio/cd player, mostly used by the younger crowd to connect their MP3 players. Some of us older people may not have even noticed it was there. Use a stereo male 3.5mm to stereo male 3.5mm cable to the HP-1 headphone jack or a stereo male 3.5mm to stereo male 2.5mm cable to the HP-1 line out jack. I prefer using the line out because it does not disable the internal speaker on the HP-1.