Recent content by Techno1

Thanks Nomadradio. Again the audio amp that i have been using for the past 5 years works great nice clean audio if the audio amp and the playback module use separate power supplies. The minute i tie them together to share the same supply the playback module audio gets distorted like bogged down...

I tried something like this and still no good. Any better suggestions as i dont think its noise it when the external power supply ground is tied to the module it just wrecks havoc. I ordered some isolated small module 12-5 volts and see what happens or if a better suggestion please im all...

The amplifier is good for 5-12 volt in using the lm386. Been using this amp for 5 years no problem in all my other boxes that use one. Its the recorder board that is getting hit when I try to use an external 5 volt power supply. Using battery supply is ok but an actual 12v supply to the 5v...

The current draw is less than 1amp. To test this im using a Astron power supply and also on my other bench a variable PS dont know the name and same effects battery powered works good but under a power supply power the distorted audio. So it seems to be the 12 volt power to the boards as it...

I made sure all pc board module and LM7805 are all grounded the same common 12 volt in power. Tried all different ways of no ground the 5v reg and the audio amp. So when its working great on battery power I switch wires to the 12 volt in power to the 5v reg and the 5v out pin to power the module...

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...

nomadradio Yes I know its in a trippler circuit for the xtals. Funny how all radios are made different in the crystal circuits for ssb radios and also Am radios no standardized simple circuit.

I sent you a message with contact info

Here is a new kit I designed with relay switching to keep the frequency stabilized no drifting. Will work with mb8719/mb8734 11.1125 or 11.3258 xtals. crystals freqs you need are 11.2625 high and 10.9655 for low with the 11.1125 xtal. remember to use trim caps and use a choke to lower the...

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

Yes the 15.360 is the loop down mix crystal Same as the cobra 29s and yes the 858 861 pll radios. I'm more so trying to see if the 14.910 and 15.810 are the correct frequencies to add 80 extra channels thanks

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...

So i was able to fix the radio 100% and the echo board is working also. What i did was follow the schematic center out of the mic gain in front and feed the echo board and now radio has audio and echo with all functions. Something in the front face plate most likely a broken trace/wire. On to...