Wednesday, February 23, 2011

RE: [HamBrewers] Re: 2M VHF

 

Dear Prabakar, That one chip has eluded me. Can you please share the details of your mod?

 

73's

 

Rajesh K

KC2KBY/VU3RGK

 

-----Original Message-----
From: HamBrewers@yahoogroups.com [mailto:HamBrewers@yahoogroups.com]On Behalf Of prabakaran prabakar
Sent: Friday, February 11, 2011 8:56 PM
To: hambrewers@yahoogroups.com
Subject: RE: [HamBrewers] Re: 2M VHF

 

 

i am using modified CXA1019 FM Radio circuit from 2006 for 2m reception.

 


To: HamBrewers@yahoogroups.com
From: sambhu_ec@yahoo.com
Date: Fri, 11 Feb 2011 14:54:34 +0000
Subject: [HamBrewers] Re: 2M VHF

 

yes..there will be heavy drifting.i am planning to use a pll controlled with a pic.. i have procured almost all the components needed for the RX,

But the coils to be wound lacks information in the document also
Is there anyone in this group who has experience with the same kit
Does anybody has the winding details of coils in RECEIVER board..
thaks again Raj and prabhakaran for their replies
--- In HamBrewers@yahoogroups.com, "Raj" <vu2zap@...> wrote:
>
> Prabhakaran,
>
> One of the problem is that simple mods will end up with low volume and it will pick up multiple stations due to >100Khz BW. We have change the filters and increase audio gain then it will do a great job. OTOH, the oscillator will drift a lot and it will be irritating to retune now and then!
>
> Welcome to the group!
>
> Cheers
> Raj vu2zap
>
> --- In HamBrewers@yahoogroups.com, "prabakaran.D" <bcdxer@> wrote:
> >
> >
> > For 2M FM receiver alone, you can modify any available fm radio receiver kit.
> > I am modified several of this kits for 2m reception.
> >
> >
> > --- In HamBrewers@yahoogroups.com, "Raj" <vu2zap@> wrote:
> > >
> > > Please attach the PDF file so that we can see the project.
> > >
> > > --- In HamBrewers@yahoogroups.com, "sambhu" <sambhu_ec@> wrote:
> > > >
> > > > Hello Friends,
> > > >
> > > > I want to build a 2m receiver..I have decided to follow the architecture of VU2IF 2m vhf transceiver. But over the internet i cant find the RX coil data. Only the coils in the TX portion is described in the PDF available in internet.
> > > >
> > > > if somebody has the winding details of coils in RX portion, then kindly share with me
> > > >
> > > >
> > > > By the way i will explain a bit about my idea..
> > > > 1. RF amp using BF 988
> > > > 2. Mixer using the same DG MOSFET
> > > > 3. FM IF using MC3359
> > > > 4. A PLL oscillator designed around a PIC and LMX 2306 or ADF 4116
> > > > 5. AF amp TBA 810
> > > >
> > > > Waiting for your help,
> > > > Thanking in advance
> > > >
> > >
> >
>



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