Just fitted a CPI base mic to my Cobra 2000 GTL for ease of use.
Manual alarme cobra cb 200 upgrade#
Just connected the DC Pos & Neg to the AC input of the Bridge Rectifier! Hand Mic to Desk Mic Upgrade Just connected the DC Pos & Neg 16VDC Output to the AC input of the Bridge Rectifier! Also did some work on the AC input filter board and added a 240VAC fuse & holder for safety.
I have now replaced this USA 110V AC Input system with new 240VAC input fixed cord to a Laptop 16 VDC 6.5 A Power Supply fitted internally. The orig 18VAC from the transformer inputs to the Bridge Rectifier Block and exits as DC and is then regulated down to 13.8VDC at around 4 Amps. Unfortunately out of the many transformers I have around in power supplies etc, I dont have one that will fit in this space at the required voltage of 18V or less, above 13.8V!ġ10 VAC USA Power Transformer to 240 VAC System Upgrade. So I removed this useless in Australia US 110VAC Transformer and was left with a sizeable space for a 240VAC Transformer. Looked like someone had replaced the original 110 VAC transformer with a larger 110VAC transformer that would not fit as the original did so was very amateurishly modified to fit in the limited space available. On checking where it was from I noticed that the 110VAC transformer was only held by one loose nut & bolt allowing it to move around.
Manual alarme cobra cb 200 mod#
I have removed the original Xtal from the bank after removing the Switch Xtal Assy from the front panel and re-soldered it back in its place on the PCB.Ĭhecked the TX with the supplied Hand Mic (5 Pin) and it was only modulating about 8 -10 watts on a whistle so alignment needed there also later on as I wanted to remove the extra channels and make the radio legal first like I have with all these US imports that seem to have extra channels.Īfter fixing the extra channels mod back to standard I noticed every time I moved or rotated the Cobra I heard a noise like something was loose inside. Usually it gets replaced with an modifiable version PLL but this had a Switched Chrystal Bank of 11 Mhz values with two wires going back to the original Xtal position. This one was different as the PLL is locked in this model. SO some TUNING & Aligning required in the RX department later!Įvery other CB radio I have seen with extras has been by digital means on the PLL. But I noticed that Gravel Guts 243 only 5 Klms away was only S2 on the Signal Meter when he is usually S8-9 on all my other radios! I was surprised to not hear a usually constant static noise from a local to my shed source in the background though, but the chatter on CH#35 LSB was coming through clear enough in the external speaker. The received audio when switched through to my CB DDRR antenna was good but the Vol pot was scratchy when moved but ok at a set position. Everything was ok except the LSB light which wont be hard to fix. It fired up with Frequency Counter on and working with all digits OK, as well as CH# selector display. So at the price I was not going to complain!Įspecially when I got it home and applied 12VDC power to back panel mobile style connector. Like Vol Pot scratchy, Extra Channels Switch drilled into front lower panel, damn, some slight scratches on facia and USA 110 VAC transformer. He did warn me that it had a few issues but I figured I could sort them out without much trouble.
Well not quite to Portarlington, but he delivered it to Geelong so met him in Maccas to pick it up and pay the cash price of $250 including external original Speaker in good condition. Managed to hear someone mention on CB CH#35 LSB that they had one for sale at a great price for cash asap and delivery anywhere in Melbourne. AT LAST! A COBRA 2000 GTL! On my CB Radio Wish list for a long time it seems.
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