Bush DAC90A - Adding Bluetooth - Page 9 - UK Vintage Radio Repair and Restoration Discussion Forum

Gabe001 · 20th May 2021, 5:49 pm

I think BT has always been backward compatible.

DonaldStott · 21st May 2021, 12:12 pm

And so the saga continues...

Just fitted another Bluetooth PCB with the KRC-86B module into a friend's DAC10 and have a couple of new problems.

When Bluetooth is turned off with no paired devices the audio from the radio is very faint and slightly distorted?

When Bluetooth is turned on and paired with my iPhone the audio is slightly distorted and sibilant??

Not sure where to go looking for a resolution ...

Gabe001 · 21st May 2021, 2:18 pm

Provided the radio itself is in good working order, check the audio ground connection from the krc-86b to the radio.

It could also be possible that you have a faulty krc-86b or damaged something when the resistors were removed.

Gabriel

DonaldStott · 21st May 2021, 2:38 pm

I jumped too soon ...

This was just a temporary lash-up to check that all was well with the Bluetooth PCB so I went back over all my connections. And of course it was a dodgy connection from the KRC-86B audio ground to the co-axial screen at the top of the volume control!

All nicely cleaned up with some flux and Bluetooth is alive and well on my friends DAC10 - he will be pleased.

Gabe001 · 21st May 2021, 3:19 pm

Any chance of a video? I can put it up on YouTube for you if you like

DonaldStott · 21st May 2021, 7:56 pm

Quote:

Originally Posted by Gabe001

Any chance of a video? I can put it up on YouTube for you if you like

I'm sure I can arrange that once everything is properly connected up, the Bluetooth PCB is secured and the chassis is back in the case. Hopefully at that point it's still working?

I have my own YouTube channel (!) so I'll Post a link to the video.

DonaldStott · 24th May 2021, 10:13 am

As promised a short video of the Bluetooth enabled Bush DAC10 - apologies for the dodgy camera work and low volume:-

https://youtu.be/jHASUJlvL8E

FOOTNOTE: Just got an email from YouTube that made me smile:-

Video title: Bush DAC10 - Bluetooth Enabled
Copyrighted content: I Feel for You (Single Version)
Claimed by: WMG
Blocked countries: Cuba, Iran, North Korea, Syria

So apologies if you are affected by these copyright restrictions!

Gabe001 · 24th May 2021, 11:15 am

Nice one Donald. It sounds good!

DonaldStott · 24th May 2021, 11:56 am

Quote:

Originally Posted by Gabe001

Nice one Donald. It sounds good!

Thanks Gabe

Two things I like:-

1. When the KRC-86B pairs with the iPhone all the usual background noise and hash disappears - its almost silent!

2. It would be a 5 minute job to open up the case and disconnect the Bluetooth board and leave the radio in its original, but restored, condition!

My friend has just stopped by to pick up this DAC10 which I reluctantly packaged up for him to take away.

Oh well, its back to my DAC90A which still hums despite my best efforts! All the standard Mods have been implemented along with swapping over a UL41 from a set that doesn't hum!!!

I may start a new Thread on why this particular DAC90A is 'a real hummer' but this may be trying the patience of Forum members?

20th May 2021, 5:49 pm	#161
Gabe001 Octode Join Date: Oct 2019 Location: Stockport, Greater Manchester, UK. Posts: 1,639	Re: Bush DAC90A - Adding Bluetooth I think BT has always been backward compatible.

21st May 2021, 12:12 pm	#162
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,842	Re: Bush DAC90A - Adding Bluetooth And so the saga continues... Just fitted another Bluetooth PCB with the KRC-86B module into a friend's DAC10 and have a couple of new problems. When Bluetooth is turned off with no paired devices the audio from the radio is very faint and slightly distorted? When Bluetooth is turned on and paired with my iPhone the audio is slightly distorted and sibilant?? Not sure where to go looking for a resolution ... __________________ BVWS Member

21st May 2021, 2:18 pm	#163
Gabe001 Octode Join Date: Oct 2019 Location: Stockport, Greater Manchester, UK. Posts: 1,639	Re: Bush DAC90A - Adding Bluetooth Provided the radio itself is in good working order, check the audio ground connection from the krc-86b to the radio. It could also be possible that you have a faulty krc-86b or damaged something when the resistors were removed. Gabriel

21st May 2021, 2:38 pm	#164
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,842	Re: Bush DAC90A - Adding Bluetooth I jumped too soon ... This was just a temporary lash-up to check that all was well with the Bluetooth PCB so I went back over all my connections. And of course it was a dodgy connection from the KRC-86B audio ground to the co-axial screen at the top of the volume control! All nicely cleaned up with some flux and Bluetooth is alive and well on my friends DAC10 - he will be pleased. __________________ BVWS Member

21st May 2021, 3:19 pm	#165
Gabe001 Octode Join Date: Oct 2019 Location: Stockport, Greater Manchester, UK. Posts: 1,639	Re: Bush DAC90A - Adding Bluetooth Any chance of a video? I can put it up on YouTube for you if you like

24th May 2021, 10:13 am	#167
DonaldStott Octode Join Date: Aug 2015 Location: Glasgow, UK. Posts: 1,842	Re: Bush DAC90A - Adding Bluetooth As promised a short video of the Bluetooth enabled Bush DAC10 - apologies for the dodgy camera work and low volume:- https://youtu.be/jHASUJlvL8E FOOTNOTE: Just got an email from YouTube that made me smile:- Video title: Bush DAC10 - Bluetooth Enabled Copyrighted content: I Feel for You (Single Version) Claimed by: WMG Blocked countries: Cuba, Iran, North Korea, Syria So apologies if you are affected by these copyright restrictions! __________________ BVWS Member Last edited by DonaldStott; 24th May 2021 at 10:20 am.

24th May 2021, 11:15 am	#168
Gabe001 Octode Join Date: Oct 2019 Location: Stockport, Greater Manchester, UK. Posts: 1,639	Re: Bush DAC90A - Adding Bluetooth Nice one Donald. It sounds good!