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So i have a audio module that I bought has 8 channels that can record and play back voice or music using just a onboard mic. The module comes with a enclosed speaker and has 3 AA batteries inside and plugs onto the module to supply 5 volts and a speaker. record audio is great and also recording...

Along the years many frequency counters have been sold out there. There were regular ones with the so239s in back and some with the so239 and a antenna built in so you can use without jumper cables. Would anyone have a circuit or directions on a way to make or add an antenna on a frequency...

Would anyone know what other manufactures us the same board as Galaxy 959 2547 949 939 PC board, I know there must be some other radios that are the same. thanks for the help

Hi have been searching the web for some info on channel mod using crystals for the Galaxy 959 and such radios that use the same pc board or pll configuration. Some info I have is that xtal 3 >15.360mhz is the one to change and either add a 15.810mhz for high or a 14.910 for low channels would...

Next radio is a connex 3300HP Radio has no tx and rx. There is audio in the speaker but no rf what so ever on a watt meter. There is also no reading on frequency counter. Like the pll is out of lock nothing and of course someone was in to the radio can tell the vco and other cans moved. So...

I have a Galaxy DX929 AM radio. There is good receive Audio and good tx and rx. There is no mic audio and no pa audio. If i key radio about 3 watts and turn on a radio next to i can not hear any audio when I keyup. If i turn on the echo and then key up I can just faintly hear the mic audio...

Any knowledge of any good priced PCB board makers in USA or Canada? Looking to have some pcbs made and have a found a few in USA and some do not respond. thanks in advance for the help

Anyone out here doing surface mount soldering. If so what are you using for flux. Im looking for a good Gel flux not the rosen core flux liquid. I see on ebay in syringes but was looking to get in a bottle. So if you are using a Gel flux what name brand. thanks for any help.

So im working on a project and these parts I need some info on. How to Identify the diode part # and size surface mount. How to Identify the capacitor value and size surface mount. The resistor pack is a 102+1k value, what size is the surface mount. thanks for any info in Identifying these...

Has anyone tried or have directions for the pll 8719 or the pll mc145106 for a 5kc jump on the channels like half channels. Not interested in doing the clarifier expansion its already unlocked and just want to do it with the pll if possible. Been looking but not much info for a easy mod (maybe...

Im looking for some small profile 3 pole 5 or 6 position rotary switch. I searched last night and this morning on Ebay and Ali express. with no good results. I need the small profile to fit in a small part box or a radio. Any help much appreciated. here is a picture of a switch but its a 2...

Im looking for a good AM SSB switch the one in radio is scratchy when switching modes. I tried to shoot some contact cleaner inside the shaft but the switch seems sealed/closed. I'm also sure its the same as a Uniden Washington pll 8734/8719. Has anyone replaced with something that will work...

So I decided to align a trc490 ssb radio same as a washington with 8719/8734. PC 385 board radio came with a mb8734 and was changed to a mb8719 with the 11.3258 xtal. In the service manual says the following at TP1 lead of r157. So I clipped onto r157 and tp1 adjust L20 for 34.92500 and I...

can the pictured freq counter be added to a cobra 148gtl and A Washington base? Where is the best point on a Washington base with pll 8734/8719 to attach wire. What is the offset for these radios to be set on freq counter? I just need to do Am channels at this time to monitor. thanks

Is there a cheap frequency counter out there that will work on all the cobra president uniden radios that use the mb8719 and mb8734 pll. Looking to wire one internally in the radio and have it sit on top. Of course a cable will be needed to connect inside and then also power the counter. Need...

Would anyone know if there is a post or write up on a channel mod for the mb8719 and mb8734 radios replacing it with a MC145106P pll I know the MC145106p chip you can get more channels out of it than the mb8719 plls. I have seen an actual kit you just plug into the removed 8719 and replaced...

Wondering if some on the forum has made a 3 position or more crystal switch. Looking to do this with transistors. I tried a circuit and did not work Ill post the picture of what I tried. I don't need an oscillator just something to switch in 3 crystals 4 xtals the most. I tried the below and...

Are there any mods for these radios that have the pll encased in black epoxy? Someone has one and wants extra channels. here is a picture of the pll in black epoxy, has anyone attempted to do extra channels or has some info on doing this. thanks

Who makes RoadKing RK-CB radios? Are there schematics for them? Are they similar to other made radios circuit wise? Looked on cbtricks and no info that I could find. thanks

I know you can do the pll upd858 mod for extra channels. I see there was an expo Kit Q for the radio. I'm trying to find what that kit did. Was it toggle switch kit Was it an Expo 100 Kit with crystals if so what was the frequencies of the kit? thanks