On Tue, 19 Jun 2007 05:47:03 -0700, Tim Shoppa wrote:
My notes, based on a ripping into a unit I got from Wal-Mart a while
back, disagree with your factory choices. According to my notes, pin
18 to Vcc selects a band which has choices of
88.7/88.9/89.1/89.3/89.5/89.7/89.9.
And pin 18 to ground selects a band which has choices of
107.7/107.9/108.1/108.3/108.5/108.7/108.9. Maybe due to this
disagreement you've got some customized or different variant version
of the chip. I think my chip was a BH1417-something or other (Rohm?).
Is HY Hyundai or something else?

That's where I got my unit, but it would appear BH1417 and HY1417 are two
different chips. I can't change the logic level on pin 18, because the
HY1417 has only 16 pinsgrin!

My unit has another chip, six pins, that appears (both from physical
inspection and the schematic) to be the actual PLL. Performs the function
of the MPSA13 and pins 7-9 on the BH1417. HY is not Hyundai. I can't
remember what it is & left the printouts (and the FCC ID# for the unit...)
at work...