What board is this?

Post by **NightProwler** » 16 May 2017, 18:25

Just picked up a Uniden 2830 and it has this board added inside, Anyone know what it is? The radio is standard apart from the 26-30MHZ mod. Sorry for the naff photo.

Cheers

Post by **Auldgeek** » 16 May 2017, 19:47

CTCSS tone board maybe?

Post by **Buick Mackane** » 16 May 2017, 19:51

Everytime i look at that i get a migrane, Whats the number on the chip?

Post by **NightProwler** » 17 May 2017, 08:11

Yeah my camera skills are shocking

Chip says MC1400 BCP XA

Post by **radio pete** » 17 May 2017, 10:27

it looks to me like a 10kc mic button shift mod

Post by **Otter** » 17 May 2017, 14:24

NightProwler wrote:Yeah my camera skills are shocking Chip says MC1400 BCP XA

OK, there's a digit missing I think. MC1400? BCP

Post by **NightProwler** » 17 May 2017, 15:14

Ahhh yes you are correct, It's MC14001 BCP

Post by **Auldgeek** » 17 May 2017, 18:14

NightProwler wrote:Ahhh yes you are correct, It's MC14001 BCP

That's a binary adder so could be to introduce a frequency shift.

It's definitely not a tone encoder then.....

Post by **oh5nxo** » 17 May 2017, 19:14

It looks like an RC oscillator, 4001 is 4 NORs, no?, the cap could be 220nF and if the resistor is 20kohm,
1 / (220 nanofarad * 20 kiloohm) into google, somewhere around 200 Hz.

Juha

Post by **bozzy** » 17 May 2017, 19:31

And there was me worried it was an MC14500 BCP and totally confused!

Post by **NightProwler** » 17 May 2017, 20:02

Well what ever it was it's now in the bin

Post by **oh5nxo** » 19 May 2017, 05:43

"Easy tuning for the Uniden HR2510" by K3JML in 73 mag Nov 1989 looks similar. Up/Down buttons to pulse the dial.

just for the record,
Juha

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