President Grant,Clarifier slide

[DIRTY HARRY]

Hi guys ,just done the regular mod on my Grant with the PC-999 board for 3Khz of slide as stated in the info of this mod on the net,does anybody know if or how to increase the amount of slide,Cheers,Shaun

[Animal]

This reply is obviously a bit late but may help someone else.

Try adding a 5.6uH coil in series to 0v end of the varactor diodes

[zodiac]

Animal,
You forgot to mention the two varactor diodes D40 and D44 that need changing to ITT410 or same as.
You may find that a 4.7uh coil will do the same job as a 5.6uh.

[Animal]

Quite correct Dave - glad you're paying attention at the back!

You'll find that the extra inductance will also give you more downward shift than up & you'll need to reset the VCO offsets (& probably find that you can't align it correctly with the Coarse control in the center notch position!)

Time to get the hammer out & flatten that detent!

[zodiac]

Do you want to lend one of my hammers

[Animal]

Hammer sorted - just need the anvil!

Did you ever manage to perfect that mod for 5kc steps on the Grant by the way - seemed like much better idea than fiddling around with the clarifier & a frequency counter to get the zero's

[zodiac]

I now use PIC's instead of an Eprom for that mod, it only needs a 2 pole switch instead of 4 poles with the Eprom.
I've got two Jumbos I'm doing at present with MK2 Cobra 148GTL DX radios being fitted with the 3900 counters and zero switching using a PIC.
Did one the same last year with a 3900 in and sold it for £270.

[harry045]

Animal,
You forgot to mention the two varactor diodes D40 and D44 that need changing to ITT410 or same as.
You may find that a 4.7uh coil will do the same job as a 5.6uh.