Search found 148 matches

by Warf135
Monday 18th Feb 2013, 3:02
Forum: CB Radio Repair and Troubleshooting
Topic: Power Supply - Voltage drop under load
Replies: 51
Views: 37826

Re: Power Supply - Voltage drop under load

If I ever come over to the UK, I'll bring my Motorola Spectra with me and the locals will hear me for sure - 120 watts, 250 channels, programmable from 450 to 490 Mhz Nice! The kenwood TK361 I used for the gateway will tune up to about 4-5 watts, but I reasoned there is no point setting the gateway...
by Warf135
Sunday 17th Feb 2013, 8:59
Forum: CB Radio Repair and Troubleshooting
Topic: Power Supply - Voltage drop under load
Replies: 51
Views: 37826

Re: Power Supply - Voltage drop under load

Hey there great to hear fro ya! Yea, I dont get on here as much any more.. Ithought the post was written by a 'bot' as it kinda talks about CB, but it makes no sense, and there is a link in the signature... "Determine a good small transformer white and blue pot modulation" determine a good small tra...
by Warf135
Tuesday 12th Feb 2013, 21:49
Forum: CB Radio Repair and Troubleshooting
Topic: Power Supply - Voltage drop under load
Replies: 51
Views: 37826

Re: Power Supply - Voltage drop under load

please note that it is not a good idea to re-open posts that are long-dead (more than 2 years in this case) as the original poster is usually long gone.

Jimicorbet, your post makes no sense at all, please clarify.
by Warf135
Sunday 24th Jun 2012, 7:53
Forum: CB Radio Modifications
Topic: UK Maycom EM-27: Add missing AM components
Replies: 0
Views: 2613

UK Maycom EM-27: Add missing AM components

Hi Guys, do any of you know the components required to get the AM TX audio working in a UK Maycom EM-27? I have seen a list somewhere on the web, but of course now i need it i cant find it... hopefully someone on here knows the needed parts and it will save me hours of staring at the schematic to wo...
by Warf135
Tuesday 15th May 2012, 10:47
Forum: CB Radio Repair and Troubleshooting
Topic: Ham Jumbo MK1 - No Swing AM
Replies: 61
Views: 38328

Re: Ham Jumbo MK1 - No Swing AM

no worries dave, i've even been guilty of it myself in the past on various forums, until i was made aware of it a few years ago i didn't know it either... Scott: I hope my last post about the forum etiquette was ok, its a habit for me now (being a moderator on ERC forum) and i forget myself sometime...
by Warf135
Tuesday 15th May 2012, 9:53
Forum: CB Radio Repair and Troubleshooting
Topic: Ham Jumbo MK1 - No Swing AM
Replies: 61
Views: 38328

Re: Ham Jumbo MK1 - No Swing AM

Hi Dave, All the work i did to the oscillator board in the jumbo made the issue loads better, but it still was not 100%... turns out one of the AM IF amp transistors on the 059 board was weak (it was either Q14 15 or 16, I cant remember now) and that was the root of my 'clarifier-reverse-rf-gain' pr...
by Warf135
Thursday 6th Oct 2011, 9:51
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Wow i cant believe a month has gone by and i haven't got round to actually wiring the Hex Switches into the radio yet... Unfortunately this Audioline homebase has to take a back seat, as more important stuff has to be done first. (i have at least re-wired the hex switches, so they are correct now!) ...
by Warf135
Friday 2nd Sep 2011, 22:33
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

First of all, make sure they are not inverted - when the switches are at position "0", there should be NO connection between any of the pins (assuming they are 5 pin switches). Yes they are 5 pin switches and they are not inverted as i said in my last post. I tested the switches at 00, FF and 55 wh...
by Warf135
Friday 2nd Sep 2011, 5:05
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

I found some mini hex switches like this: http://normsweb.com/ext/mini_hex.jpg so i built this little circuit: http://normsweb.com/ext/mini_hex2.jpg The mini hex switches are not inverted, so i have added a 10k resistor to each output pin. If i build another one i would probably use coloured ribbon ...
by Warf135
Friday 26th Aug 2011, 3:20
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

it sounds like a do-able project, though i have a few other projects on the go first so it this will have to wait till i can clear some space on my workbench... I did look at those hex switches this morning funny enough and nearly bought them then... I have plenty of vero board here so could make up...
by Warf135
Thursday 25th Aug 2011, 2:16
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Ah, ok! I think my tiny brain get it now lol! The inputs from the channel selector to eprom are address and the output to the PLL are data , so that when the input address is xxxxxxxx the output data is set to xxxxxxxx So, getting the address data should be easy, by using a PLL truth chart for the T...
by Warf135
Wednesday 24th Aug 2011, 21:48
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Thanks once again for an interesting and detailed reply. I understand about working out what code is required to get the output PLL to change frequencies, but I don't understand how to convert the code coming in to the code thats needed coming out. so if the input for ch1 would be HLLLLHHH and the o...
by Warf135
Wednesday 24th Aug 2011, 12:25
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Thanks for that explanation, I dont think i'll be able to work out the programming myself... (sounds like it will be a lots of maths involved lol)

I'll see if i can find anyone who has a dump from a working one, or if i can find a working one somewhere, although i don't hold out much hope of that :P
by Warf135
Sunday 21st Aug 2011, 6:17
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Thanks to Dave (Zodiac), here is a dump of the eprom: In .hex format http://normsweb.com/ext/eprom.hex In .txt format http://normsweb.com/ext/eprom.txt It seems like it may be corrupted as the data makes no sense (not that I know a lot about hex programming), and looks totally completely different t...
by Warf135
Monday 15th Aug 2011, 1:04
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

I have the eprom out and ready to send to Dave when the post office opens.. then we will know whats going on with it and weather it will read or not. I'm pretty sure the eprom is corrupted, but it may not be... Using the channel display lines to run the PLL switching is a great idea, although annoyi...
by Warf135
Saturday 13th Aug 2011, 6:55
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

i'm not sure if you could read the program with 4 dead legs on the eprom... I'll freely send it to you if you fancy having a play with it, but its not worth me spending much money on. PM me your address
by Warf135
Saturday 13th Aug 2011, 1:37
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

All the eprom inputs from the TC9119 to the eprom test fine, so I tested the output pins and they were mostly wrong. I have took the eprom board out of the radio, and happened to be chatting to a retired radio doc (in tesco's lol) who took the eprom board home to test it. His report is: "4 of the pr...
by Warf135
Wednesday 10th Aug 2011, 12:23
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Rick sent me the wiring info for my eprom board ages ago when i took it out of a scrap radio, but unfortunately he's away at the moment so i cant ask him about it. I'll be testing the eprom input voltages tomorrow... i'm pretty sure they will be ok, as i double checked that the radio was working per...
by Warf135
Wednesday 10th Aug 2011, 5:36
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Thanks Dave i'll Check those against my eprom board to see if its getting the correct inputs. (assuming that / is high and blank is low).

if the eprom is getting the correct inputs but incorrect outputs, can i assume that the eprom is bad?
by Warf135
Wednesday 10th Aug 2011, 2:07
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

pins 10 through 18 on the TC9119 goto pins 3 through 10 on the eprom, although now i notice that pin 10 and pin 18 go through the or gate chip so i will double check those. I do not have a Eprom programmer, but i do have a homebrew eprom reader circuit that plugs into a PC serial port, that i use to...
by Warf135
Monday 8th Aug 2011, 4:31
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Ok it looks like the eprom may be bad. Here are some voltages: TC9119p PLL in uniden radio: Pins 10 to 18: 7 7 7 7 7 7 7 7 0 Ch 1 7 0 0 0 0 7 7 7 0 Ch 2 7 0 0 7 0 7 7 7 0 Ch 3 0 7 0 7 7 7 7 7 0 Ch 4 0 0 0 7 0 7 7 7 0 Ch 5 0 0 7 0 0 7 0 7 0 Ch 20 0 0 7 0 0 0 7 0 0 Ch 40 with ribbon cable to eprom boa...
by Warf135
Friday 5th Aug 2011, 13:22
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

This should help... I spent all afternoon drawing it and it may contain errors, but should give you a reasonable idea how this eprom conversion board works: http://normsweb.com/ext/LC2_sch.jpg I'll check for voltage at TP1 tomorrow. I believe you could be right that its 'going out of lock' thats wha...
by Warf135
Wednesday 3rd Aug 2011, 4:13
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

You are 100% correct in what you say.. the 10.240Mhz crystal is connected to pins 3 and 4 of the MC145106 on the eprom board, there is a yellow wire from pin 4 on the MC145106 that connects to C60 on the uniden board and on to where it needs to. And so the green wire is still homeless :( Without the...
by Warf135
Wednesday 3rd Aug 2011, 1:03
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

Re: JD Custom LC2 (iss1) Eprom conversion - TC9119

Hi thanks for the reply, I'll upload a pic of the eprom board later so you can see it ... its certainly an early board i would say. The 10.240mhz crystal is removed from the radio and fitted into the eprom board which has the 106 chip and also a cd4070be quad exclusive 'or' gate chip. It would appea...
by Warf135
Tuesday 2nd Aug 2011, 5:26
Forum: CB Radio Modifications
Topic: JD Custom LC2 (iss1) Eprom conversion - TC9119
Replies: 38
Views: 26617

JD Custom LC2 (iss1) Eprom conversion - TC9119

JD Custom LC2 Eprom conversion board Fitting into audioline pt345 homebase (039aa) Hello all. I have this Eprom board and am in the process of fitting it into my rig, but it appears that there are one or two pages missing from the instructions, and i am left with 5 wires and nowhere for them to go.....

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