Poll - Radio Reception Issues On Double Din

[MARKUK]

Fancy having a go Harry ?

[HarryM1BYT]

Sadly, my eyes are not up to that sort of thing now, 20 years ago I would not have hesitated. I've got some Veroboard layout and design software somewhere, if it might help?

[MARKUK]

Originally Posted by HarryM1BYT

Sadly, my eyes are not up to that sort of thing now, 20 years ago I would not have hesitated. I've got some Veroboard layout and design software somewhere, if it might help?

Always worth a go Harry if you can manage to dig it out !...

Cheers

[MARKUK]

Hi Guys,

I have built the new version amp which boosts by 22db..




I have tried various configurations of this...

1. Aerial into splitter and used one output to the amp to the Radio and the other to TMC

2. Aerial into amp and then splitter out to Radio & TMC

3. Aerial into amp and then splitter out TMC & other via second amp to Radio

4. Aerial into splitter and used one output to "new" amp to Radio and the other output to "old" amp then to TMC

5. Aerial straight into back of Radio and Amp ( either ) in TMC

Managed to blow a few fuses as the "new" amp has 12v going through the aerial cable so if you touch the metal casing the fuse blows...( £3.99 for 6 fuses at Halfords !!! = RIP OFF !!)

The best solution so far is number two, however AM suffers and some channels esp R1 & R3 have slight hiss...but then I could pick up channels that I couldn't before..go figure !..

Of course this was just sat on my driveway, I will know more this week when out and about...

Still can't find the little TMC lead that came with the unit...I would say that using that hidden in a pillar with one of the amps would probably work but until I find the thing, can't say for sure..

The "new" amp IS better than the "old" one that's for sure...FM is even better than before,,

The best reception was indeed with the normal aerial straight in the back on all FM & AM channels but if you want to use the TMC, we will have to compromise somewhat because as soon
as we introduce a splitter at whatever point, it will make a difference.

It's got dark now and I have mislaid some screws in the car, so that's all for tonight, however I will have to go back tomorrow and put things back like the DAB etc which I had to move to get to the fusebox !..

What I am going to try tomorrow is boosting the signal from the back pillar instead of at the Head Unit end and see if that makes any difference..

I will try the "old" amp then the "new" and then a combination of both..

Hope this all makes sense !!

[HarryM1BYT]

Originally Posted by MARKUK

Always worth a go Harry if you can manage to dig it out !...

Cheers

This is the one I had in mind-

http://www.marlwifi.org.nz/other/stripboard-magic

but there is this one as well.

http://www.heyrick.co.uk/software/verodes/

[MARKUK]

Cool Harry,

Will take a look !

[HarryM1BYT]

The best solution so far is number two, however AM suffers and some channels esp R1 & R3 have slight hiss...

Maybe too much gain on the stronger signals and over driving the DD input?

Still can't find the little TMC lead that came with the unit...I would say that using that hidden in a pillar with one of the amps would probably work but until I find the thing, can't say for sure..

No great loss, it is only a bit of wire. Just poking the bared end of a bit of wire of around the same length into the centre contact of the input socket would work just as well.

Better if you intend using a separate antenna installed behind the pillar trim, would be to convert a coax extension lead into an FM antenna....

Cut the female socket end off and strip the outer cover and screening back for 713mm - leaving the inner wires insulation in place. In other words, expose 713mm of the inner core.

[MARKUK]

Originally Posted by HarryM1BYT

The best solution so far is number two, however AM suffers and some channels esp R1 & R3 have slight hiss...

Maybe too much gain on the stronger signals and over driving the DD input?

Yeah, I had that thought also


Still can't find the little TMC lead that came with the unit...I would say that using that hidden in a pillar with one of the amps would probably work but until I find the thing, can't say for sure..

No great loss, it is only a bit of wire. Just poking the bared end of a bit of wire of around the same length into the centre contact of the input socket would work just as well.

Better if you intend using a separate antenna installed behind the pillar trim, would be to convert a coax extension lead into an FM antenna....

Cut the female socket end off and strip the outer cover and screening back for 713mm - leaving the inner wires insulation in place. In other words, expose 713mm of the inner core.

Bit ahead of you there Harry !...have made one of those and also adapted a magmount aerial from my little 7' DVB TV...

Will try both tomorrow !

..........

[MARKUK]

OK Guys,

Here it is....

Problem..?

In order to use Radio AND TMC at the same time we had to use a aplitter which was causing the signal degradation...

Solution..?

Remove the splitter !..

How..?

Well that will be in my next post as I am going to do some videos to show what you need to do !...

Watch This space !!!

[HarryM1BYT]

Originally Posted by MARKUK

OK Guys,


Solution..?

Remove the splitter !..

How..?

Well that will be in my next post as I am going to do some videos to show what you need to do !...

Watch This space !!!

Watching with extreme interest

Orders popcorn