Radio Interface

Started by aswa2 August 11, 2010
Hi Everyone,
I am an absolute 'newbie' to these devices, but am hoping some of you can help. I would like to build an interface to connect the the PLL of som old Two way radios in order to make use of them for ham radio.
I will try to summerise what is needed.

Count up and down with either a couple of push buttons or a rotary controller.

Disply either a chanel number on a pair of 7 seg LED displays OR show the corosponding frequancy on an LCD Display. This dosnt need to read actual frequecy, just the frequency that corosponds to that chanel number.

16 bit binary code output, this changes from Recieve( RX) to Transmit (TX) so i will need the processor to be aware of the change, its easy to pick up 0 or 5 volts from the radio to indicat if you are in TX or RX.

Ease of programing...USB? Serial?

Any Ideas or suggetions would be greatly appreciated.

Andre
Vk3FASW.

Hi Andre,

Do you have info on how the radios get their PLL info programmed? What chips
are used?

What are the makes and model numbers of the radios?

This might not be too difficult a project.

Zack W9SZ

On Wed, Aug 11, 2010 at 2:55 AM, aswa2 wrote:

> Hi Everyone,
> I am an absolute 'newbie' to these devices, but am hoping some of you can
> help. I would like to build an interface to connect the the PLL of som old
> Two way radios in order to make use of them for ham radio.
> I will try to summerise what is needed.
>
> Count up and down with either a couple of push buttons or a rotary
> controller.
>
> Disply either a chanel number on a pair of 7 seg LED displays OR show the
> corosponding frequancy on an LCD Display. This dosnt need to read actual
> frequecy, just the frequency that corosponds to that chanel number.
>
> 16 bit binary code output, this changes from Recieve( RX) to Transmit (TX)
> so i will need the processor to be aware of the change, its easy to pick up
> 0 or 5 volts from the radio to indicat if you are in TX or RX.
>
> Ease of programing...USB? Serial?
>
> Any Ideas or suggetions would be greatly appreciated.
>
> Andre
> Vk3FASW.
>


Hi Zack,
The Main Radio(s) is a Tait t-496, but the T500 uses the same scheme for programing. Im on a break at work at the moment so cant pull a diagrame, but will check what the PLL is when i get home.

Cheers.
--- In a..., Zack Widup wrote:
>
> Hi Andre,
>
> Do you have info on how the radios get their PLL info programmed? What chips
> are used?
>
> What are the makes and model numbers of the radios?
>
> This might not be too difficult a project.
>
> Zack W9SZ
>
> On Wed, Aug 11, 2010 at 2:55 AM, aswa2 wrote:
>
> >
> >
> > Hi Everyone,
> > I am an absolute 'newbie' to these devices, but am hoping some of you can
> > help. I would like to build an interface to connect the the PLL of som old
> > Two way radios in order to make use of them for ham radio.
> > I will try to summerise what is needed.
> >
> > Count up and down with either a couple of push buttons or a rotary
> > controller.
> >
> > Disply either a chanel number on a pair of 7 seg LED displays OR show the
> > corosponding frequancy on an LCD Display. This dosnt need to read actual
> > frequecy, just the frequency that corosponds to that chanel number.
> >
> > 16 bit binary code output, this changes from Recieve( RX) to Transmit (TX)
> > so i will need the processor to be aware of the change, its easy to pick up
> > 0 or 5 volts from the radio to indicat if you are in TX or RX.
> >
> > Ease of programing...USB? Serial?
> >
> > Any Ideas or suggetions would be greatly appreciated.
> >
> > Andre
> > Vk3FASW.
> >
> >
> >
>
>

The PLL is an MC145152. It is normally programes by a pair of Eproms, on for TX one for RX, which are in turn addressed by a pair of BCD Thumbwheels. The air is to remove both the thumbwheels and the EPROMs.

Andre

--- In a..., "aswa2" wrote:
>
> Hi Zack,
> The Main Radio(s) is a Tait t-496, but the T500 uses the same scheme for programing. Im on a break at work at the moment so cant pull a diagrame, but will check what the PLL is when i get home.
>
> Cheers.
> --- In a..., Zack Widup wrote:
> >
> > Hi Andre,
> >
> > Do you have info on how the radios get their PLL info programmed? What chips
> > are used?
> >
> > What are the makes and model numbers of the radios?
> >
> > This might not be too difficult a project.
> >
> > Zack W9SZ
> >
> > On Wed, Aug 11, 2010 at 2:55 AM, aswa2 wrote:
> >
> > >
> > >
> > > Hi Everyone,
> > > I am an absolute 'newbie' to these devices, but am hoping some of you can
> > > help. I would like to build an interface to connect the the PLL of som old
> > > Two way radios in order to make use of them for ham radio.
> > > I will try to summerise what is needed.
> > >
> > > Count up and down with either a couple of push buttons or a rotary
> > > controller.
> > >
> > > Disply either a chanel number on a pair of 7 seg LED displays OR show the
> > > corosponding frequancy on an LCD Display. This dosnt need to read actual
> > > frequecy, just the frequency that corosponds to that chanel number.
> > >
> > > 16 bit binary code output, this changes from Recieve( RX) to Transmit (TX)
> > > so i will need the processor to be aware of the change, its easy to pick up
> > > 0 or 5 volts from the radio to indicat if you are in TX or RX.
> > >
> > > Ease of programing...USB? Serial?
> > >
> > > Any Ideas or suggetions would be greatly appreciated.
> > >
> > > Andre
> > > Vk3FASW.
> > >
> > >
> > >
> >
> >
> >
>

I have used the MC14515X series PLL chips quite a bit. I've been using an
AVR to send the data to an MC145158. It should be relatively easy to do al
sorts of things with those chips.

All you need to do is somehow cut the traces or gain access to the
appropriate pins on the device so you can connect the AVR lines to it, and
then determine how to program the PLL chip so it does what you want.

Zack
On Thu, Aug 12, 2010 at 1:43 PM, aswa2 wrote:

> The PLL is an MC145152. It is normally programes by a pair of Eproms, on
> for TX one for RX, which are in turn addressed by a pair of BCD Thumbwheels.
> The air is to remove both the thumbwheels and the EPROMs.
>
> Andre
> --- In a... , "aswa2"
> wrote:
> >
> > Hi Zack,
> > The Main Radio(s) is a Tait t-496, but the T500 uses the same scheme for
> programing. Im on a break at work at the moment so cant pull a diagrame, but
> will check what the PLL is when i get home.
> >
> > Cheers.
> >
> >
> > --- In a... , Zack Widup
> wrote:
> > >
> > > Hi Andre,
> > >
> > > Do you have info on how the radios get their PLL info programmed? What
> chips
> > > are used?
> > >
> > > What are the makes and model numbers of the radios?
> > >
> > > This might not be too difficult a project.
> > >
> > > Zack W9SZ
> > >
> > > On Wed, Aug 11, 2010 at 2:55 AM, aswa2 wrote:
> > >
> > > >
> > > >
> > > > Hi Everyone,
> > > > I am an absolute 'newbie' to these devices, but am hoping some of you
> can
> > > > help. I would like to build an interface to connect the the PLL of
> som old
> > > > Two way radios in order to make use of them for ham radio.
> > > > I will try to summerise what is needed.
> > > >
> > > > Count up and down with either a couple of push buttons or a rotary
> > > > controller.
> > > >
> > > > Disply either a chanel number on a pair of 7 seg LED displays OR show
> the
> > > > corosponding frequancy on an LCD Display. This dosnt need to read
> actual
> > > > frequecy, just the frequency that corosponds to that chanel number.
> > > >
> > > > 16 bit binary code output, this changes from Recieve( RX) to Transmit
> (TX)
> > > > so i will need the processor to be aware of the change, its easy to
> pick up
> > > > 0 or 5 volts from the radio to indicat if you are in TX or RX.
> > > >
> > > > Ease of programing...USB? Serial?
> > > >
> > > > Any Ideas or suggetions would be greatly appreciated.
> > > >
> > > > Andre
> > > > Vk3FASW.
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> >
>