The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom

Does this work on the Mk1 148 GTL-DX / Superstar 360FM? Or is it for the US market ones only?

cubwolf wrote:In fact i have just had one in for a uk eprom and it is indeed a 3900 in a posh coat.

Ahh, the old Cobra 148 GTL-DX lives on

Hi Rick I too am very impressed by your knowledge especially of the obscure (to me at least) old am radios. I agree though on people not having the courtesy to say thank you. I have a few emails a day from people on ebay asking whats wrong with their radio. If i can help out i do but its not very o...

I've read all your posts helping people out, rick, and I must say you are probably the most helpful person I've seen on any forum. Keep up the good work, cos I may need your help one day soon, too

Question is in the topic. I only ask because I have just bought one of each, and they look identical except the name, so what's the difference?

looks quite similar to this.....
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... %3AIT&rd=1

Welcome in, Cubby

To be honest, if you can't follow the instructions you're better off getting it fitted by a pro.
Sorry

Dunno, all I know there's a jack on the 3900

The 3900 does have a counter jack, the 360 doesn't

I was gonna replace the lead on my RK76: Now I think I'll just get an extention cable

thanks, mate

Cheers, zody.

Cheers, Zody. I'm assured this is the Mk1 based one (it has the Mk1 chip near the channel switch). I'll have a gander for the beep Which VR is for the FM dev, do you know?

Those that have one of these will know they're based on the Mk1 Cobra 148 GTL-DX, and also they have BLOODY AWFUL FM deviation! And that brings me cunningly to my problem; how do I change the bloody awful FM transmit audio? I've already put an Astatic "Teardrop" on it, and even with the to...

Anyone know the VR to adjust the squelch on one of these? The one I have doesn't squelch anything below S7, which in a "High W*nker" area makes conversation difficult (idiots STILL playing music on the 19!!).

Specifically I need a new curly cable for an RK76. Anyone know of a supplier with some "New Old" stock or something? Or is there a good pattern replacement?
Ta

Rick, I see you in there: Where in Beds are you? Would it be feasable to send the rig to you and collect it in person when it's done?

Err.... I think I'll leave it to someone that knows how to do it.... anyone know a reliable, trustworthy, fast and inexpensive rig-doctor in my area (Hertfordshire, England)?

Have we not met before, sir?

zodiac wrote:Thanks Rick, does that mean you have NEW channel switches for Cybernet SSB radios.
Dave.

I was gonna ask about that
OK, Zody, how should I go about cleaning my channel switch ?

It's very intermittent. Some channels work sometimes if I jiggle my knob a bit (oooh err, obviously), some work anyway, some have recieve, some have nothing. I've tried contact cleaner and that's helped a bit, but it looks like it may be a buggered switch because it's the same on all bands and in al...

I had this with my Lafayette 1200FM. It turned out to be a broken track from the switch to the PLL. Look for cracks in the mainboard, dry joints around the switch/PLL, or where a wire may have broken/come adrift.

A diagram for the 444 would be handy, anyway. Could you send me one please?

Here's what happened. Got this radio from EBay and it worked fine. Suddenly, a couple of days ago, it stopped TXing on certain channels. Could the chan selector switch be FUBAR'd, or could it just be a dry joint? It makes a difference if I go up or down to the channels, but I have nothing between 1 ...

Plan on giving this a try soon. Did you see my post on modding the Mod for FM? I need to make this a versatile radio to justify keeping it to the Spouse

read this about helping the PTBM059 FM modulation.... http://home.btconnect.com/blaggard/059.htm this is the bit I'm interested in.. "all we need do is to isolate the VCO from the smoothing circuit (we don't want to smooth our audio input!) by cutting the track that connects TP2 to the VCO bloc...

Yup, lip mounts are good. I have one on the tailgate of my VW Golf, and that's very stable. Remember to scrape the paint off where the grub-screws clamp to the lip, though, or you'll have problems with VSWR.

Sussed: The Laffy had one of the tracks from the PLL to the channel selector switch cut (something missed by my rig doctor). Made a connection and now all the channels go where they should All I need to do now is get the display to show 41-80 on hi, and change the clarifier to a KC Slide Ideas?

More crap: Here's a list of channels as they correspond to each rig ONLY, all from CEPT unless otherwise stated. Laff 1 2 3 4 5 6 7 8 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Colt 2 2 x 5 5 7 7 8 10 10 xx 13 13 15 15 16 18 18 xx 21 21 24 23 24 2...

Okay, I've now tested the colt and the laffy by the simple expedient of keying one up on a channel and listening to it on the other radio. it's the same in AM and FM: That is to say, one of the radio's is definetly off frequency, but I know not which one. On the laffy I'll TX and the audio is on the...

On FM Ch 10 and 16 are fully audible and recieve fine on my laffy on FM. Any other channel and the FM sounds off frequency. Not tried it with the AM, but may do tonight.

This rig seems to have a fault in that it's off frequency on most channels on all bands. I know it's ok on 10 and 16 on mid and high, but the rest are all over the place and I can't find them on my lafayette 1200FM. Any ideas?

I have a Lafayette 1200FM (similar to MM2, Jumbo1, identical mainboard), and want to change the clarifier to a KC shift to make it easier to get UK40 channels. What do I connect to where and how? Or, can anyone direct me to a webpage with the necessary info?
TiA