Cobra 148GTL adding FM?

[electronicsmachine]

Spectrum FM 455 does work perfectly fine in a 148GTL [that has a 455IF], I have fitted many of them, BUT you will need to add a 10n cap across pins 2 and 7 of the 741 op amp.

I'm also interested, I have a Cobra 148GTL, but does the described FM card work perfectly...?

He doesn’t do FM boards as far as I know, I have PLL boards for a wide range of PLL, The MB8719 board I have does -40 +40, U.K. Band, -5 and +10

They work with all mb8719 crystals with correct settings

15.480 (Mk1 148/30), 15.4825 (McKinley/Stalker), 15.4525 (Grant), 11.325, 11.1125

The 148GTL doesn’t always work on Low band, So 11.325 has to be swapped for an 11.1125

hi where did you get this 120 channel board for the cobra? thank you

[cb4ever104]

hi where did you get this 120 channel board for the cobra? thank you

From Nick "163TM847" . Search on his username 163TM847 for contact details .

[163TM847]

I'm also interested, I have a Cobra 148GTL, but does the described FM card work perfectly...?

He doesn’t do FM boards as far as I know, I have PLL boards for a wide range of PLL, The MB8719 board I have does -40 +40, U.K. Band, -5 and +10

They work with all mb8719 crystals with correct settings

15.480 (Mk1 148/30), 15.4825 (McKinley/Stalker), 15.4525 (Grant), 11.325, 11.1125

The 148GTL doesn’t always work on Low band, So 11.325 has to be swapped for an 11.1125

hi where did you get this 120 channel board for the cobra? thank you

You can get same board from Maurer

Email
[email protected]

But his board only does +5 for zeros, or atleast used too, I’m not sure if he’s changed that by now.

I don’t do mine as self install as you could run into trouble installing it and most people tend to blame the board rather than the way they did it, plus the pitch of the PLL can vary, so if I were to solder on the pin headers it may not be correct pitch

If you get one, Maurer rarely sends any install instructions, A resistor has to be removed (1k5 on pin one) and if low band doesn’t lock properly then the 11.325 has to be swapped for a 11.1125 and pin 10 tied low (soldered to ground) I have come across some 148GTL that won’t work at all with board fitted, if that happens a 10k resistor has to be changed for a 1k, I can’t give specific location of these resistors because I do it from memory and don’t have it written down