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mwl168

Kerry Design mini GRHV\GRLV and JoaMat mini T2 Group Buy

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2 minutes ago, Kerry said:

The resistors on the digital attenuator are 1206.

For the HV supplies the resistors are a mix of 1206 and 0805. 

Thanks!

...that means I´ill suffer :sadcat:

 

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Here’s the back of the digital attenuator. 
42759DCA-C2F5-4999-86E5-C841AD8848DB.thumb.jpeg.d00b899726f5a1ca320faa80d29cc167.jpeg

This might make you suffer more :) 

Those chips need to be started with a hot air station. 

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23 hours ago, lkong said:

Is it too late?

Please sign me up for:

2x GRHVxxx
1x GRLV79xx
1x GRLV78xx
1x Main Board

1x miniT2

Not too late. I will add you to the GB.

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We have another hitch and delay.

I ordered the updated GRLV boards in September and they were sent out to me around Sep 18. The tracking info shows that the package cleared US customs on Sep. 30 and was en route to me via US post network. I have not received it yet and local post office confirmed that they do not have it either.

I got in contact with the manufacture and they asked me to wait for a few more days before they can open an investigation. I am going to give it another week and if the package is till absent the manufacture will provide a coupon  at that time for me to reorder the boards.

Apologize for the further delay. Will provide another update in a week or so. 

 

Table updated.

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On 10/2/2019 at 1:47 AM, Kerry said:

PS  I'm happy using the 7V reference.  It requires less current which reduces heat and works well.

I guess it’s R13 that sets the current. Which resistance do use and what current do you get?

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Yes, R13 sets the current for the reference.  I use 4.7K and it was giving me .92mA.

Here's a shot of the positive rail...

20191021_164129723_iOS.thumb.jpg.729b9945c7e114357564f156b13a060f.jpg

(Wow - It's been sitting out for a couple of weeks and got very dusty)

Edited by Kerry
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Thanks for info. I think I’m abandoning the idea of building an ordinary (through hole components) PSU now.

Excellent achievements, Kerry.

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On 10/18/2019 at 8:40 AM, mwl168 said:

We have another hitch and delay.

I ordered the updated GRLV boards in September and they were sent out to me around Sep 18. The tracking info shows that the package cleared US customs on Sep. 30 and was en route to me via US post network. I have not received it yet and local post office confirmed that they do not have it either.

I got in contact with the manufacture and they asked me to wait for a few more days before they can open an investigation. I am going to give it another week and if the package is till absent the manufacture will provide a coupon  at that time for me to reorder the boards.

Apologize for the further delay. Will provide another update in a week or so. 

 

Table updated.

The previous PCB order has been officially declared missing. The Fab house was kind enough to provide a refund coupon for me to reorder the PCB which I did. I used a different, higher-cost shipping option this time. 

With better luck this time I should receive the PCB in about 2 - 3 weeks.    

Edited by mwl168
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Some good news on my side.  I was able to successfully test the GR79xx board.

Here's a picture of the GR7915 (left) next to the GR7815 micro (right). 

2134065084_20191211_212431536_iOS(2).thumb.jpg.e5c822f7439178ee5942176b197b370d.jpg

I've only tested against my DC shop supply but it performs as expected so far :) 

 

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On 1/5/2020 at 5:05 AM, Whitigir said:

Can I be added in for 4x of GRHV79xxx ?

To miniaturized these stuff, @Kerry you are amazing !!

 

To clarify, you are listed for 6 GRHV79xxx now. Do you like to add 4 more or change from 6x to 4x? 

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Hi,

It's not to late to order a set for a T2 ?

2x GRHVxxx 

1x GRLV78xx

1x GRLV79xx

1x main board

1x mini t2 board

Thanks!

 

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16 hours ago, JoseA said:

Hi,

It's not to late to order a set for a T2 ?

2x GRHVxxx 

1x GRLV78xx

1x GRLV79xx

1x main board

1x mini t2 board

Thanks!

 

Added.

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On 1/6/2020 at 5:55 PM, mwl168 said:

To clarify, you are listed for 6 GRHV79xxx now. Do you like to add 4 more or change from 6x to 4x? 

Oh, I didn’t check, sorry for that.  Please keep it as is.  I got so excited seeing Kerry pictures and the “greed in me” yelled “me want!”

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No worries.

This GB has dragged on for far too long. We should be back on track soon!

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Thanks for all your contributions to the community, mwl168.  No rush here!  

 

 

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I just could not stay away from this thread.. 

Please add an order for the following for me -- and many thanks mwl168.. :)

  • 2 x GRHVxxx 
  • 1 x GRLV78xx
  • 1 x GRLV79xx
  • 1 x main board

looking forward to it (and no rush).. 

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14 hours ago, mikeymad said:

I just could not stay away from this thread.. 

Please add an order for the following for me -- and many thanks mwl168.. :)

  • 2 x GRHVxxx 
  • 1 x GRLV78xx
  • 1 x GRLV79xx
  • 1 x main board

looking forward to it (and no rush).. 

Added!

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