Date   
Re: Enclosure #parts

Doug W
 

On Wed, Jun 27, 2018 at 07:27 am, Jack Purdum wrote:
need a way to cool the PA's with some kind of fan, but without destroying the watertight nature of the case
I'm assuming you will be operating with the case open.  I haven't done the math but I would think unless you fall asleep on the ptt or your key I doubt you would need anything more than some vent holes in your acrylic plate.  You could upgrade the heat sinks for insurance.  If you really want a fan why couldn't you just put in the acrylic?
 
--
www.bitxmap.com

Re: Enclosure #parts

Jack, W8TEE
 

I will probably upgrade the heat sinks and the fan will be mounted either on the top or the interior side of the case. I'm not a big fan of top vents for cooling. I may mount a small speaker on the top with holes for that, but the speaker will be "sealed" to the top. (The larger Apache case will likely have a vertical separator, with the paddle, headphones, and battery pack in the other half. I will probably mount the fan on that vertical partition. That way, if I spill something or it's starts raining, liquid won't get into the xcvr section of the case.) I will need some kind of cooling as the JackAl board draws enough current to heat the regulators up a bit.

Jack, W8TEE

On Wednesday, June 27, 2018, 10:39:39 AM EDT, Doug W <dougwilner@...> wrote:


On Wed, Jun 27, 2018 at 07:27 am, Jack Purdum wrote:
need a way to cool the PA's with some kind of fan, but without destroying the watertight nature of the case
I'm assuming you will be operating with the case open.  I haven't done the math but I would think unless you fall asleep on the ptt or your key I doubt you would need anything more than some vent holes in your acrylic plate.  You could upgrade the heat sinks for insurance.  If you really want a fan why couldn't you just put in the acrylic?
 
--
www.bitxmap.com

Re: Easy, Inexpensive Cooling Fan, Excelway Case

Arvo W0VRA
 

On Wed, Jun 27, 2018 at 07:28 am, Jack Purdum wrote:
Is the fan quiet, or does the rcvr pick it up?
The fan is aurally quiet enough, but the case resonates a tad with it, so you can hear it.  If I wanted to do some vibration isolation and case panel damping work I could probably make it unnoticeable.

I have not noticed any noise on RX, but I'll do some fiddling to see if it gets picked up.  Any ideas for a good test?  I suppose I could use the RSP1A to look for its signal?

Re: Easy, Inexpensive Cooling Fan, Excelway Case

Doug W
 

I was in a hurry when I put my fan in so I went with this one https://www.digikey.com/product-detail/en/sunon-fans/HA60251V4-1000U-A99/259-1793-ND/6198731 and spent about as much for the grate as your fan cost.  Spending $6 on that fan felt almost extravagant but it is silent at least to my ear.  I don't have a good way to test for interference but I don't see anything different on the WSJT waterfall or hear any noise on my speaker which as all I have to go by.


--
www.bitxmap.com

Re: Enclosure #parts

M Garza <mgarza896@...>
 

Jack, 
You could use a single sheet of aluminum metal stock, and mount the PA transistors to that.  It could have a lip that the acrylic could bolt onto.
You could use aluminum angle stock to make the lip and just bolt the acrylic and aluminum sheet to it.  If you have a way to bend 
the aluminum sheet metal, you could just fold in the lip on it and make it out of 1 piece of aluminum.  You could put it on the side that will be exposed to allow the air to circulate.  

Here is a very bad ASCII drawing:

=========================     <- Acrylic sheet
                                                ---|     <- Aluminum lip (aluminum angle stock or folded metal)
                                                    |      <- Aluminum sheet stock
                                                    |
                                                    |


Just an idea.

Marco - KG5PRT



On Wed, Jun 27, 2018 at 9:52 AM Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
I will probably upgrade the heat sinks and the fan will be mounted either on the top or the interior side of the case. I'm not a big fan of top vents for cooling. I may mount a small speaker on the top with holes for that, but the speaker will be "sealed" to the top. (The larger Apache case will likely have a vertical separator, with the paddle, headphones, and battery pack in the other half. I will probably mount the fan on that vertical partition. That way, if I spill something or it's starts raining, liquid won't get into the xcvr section of the case.) I will need some kind of cooling as the JackAl board draws enough current to heat the regulators up a bit.

Jack, W8TEE

On Wednesday, June 27, 2018, 10:39:39 AM EDT, Doug W <dougwilner@...> wrote:


On Wed, Jun 27, 2018 at 07:27 am, Jack Purdum wrote:
need a way to cool the PA's with some kind of fan, but without destroying the watertight nature of the case
I'm assuming you will be operating with the case open.  I haven't done the math but I would think unless you fall asleep on the ptt or your key I doubt you would need anything more than some vent holes in your acrylic plate.  You could upgrade the heat sinks for insurance.  If you really want a fan why couldn't you just put in the acrylic?
 
--
www.bitxmap.com

Re: Easy, Inexpensive Cooling Fan, Excelway Case

Arvo W0VRA
 

On Wed, Jun 27, 2018 at 08:04 am, Doug W wrote:
...and spent about as much for the grate as your fan cost.
Haha, I keep sticking my finger in the fan so I'm waiting for this:

https://www.ebay.com/itm/2-Pcs-Dustproof-Dust-Filter-Guard-Grill-Cover-for-50mm-PC-Case-Fan-E5O8/282946981964

Re: Easy, Inexpensive Cooling Fan, Excelway Case

 

If the fan is generating RF noise,  that can often be cured but putting ferrite beads on both of the leads as close to the body of the fan as practical.
RF has a way of sneaking around on DC power leads if you are not careful. 

Cheers

Michael VE3WMB

Worked the SKCC Sprint with my uBITX

Bill Carpenter <nz0tham@...>
 

I used my uBITX in the SKCC sprint last night and it performed very well.  I have the ND6T click kit installed but have not done the AGC kit yet so I had to ride the volume control a bit!  I used a Four States QRP Hi-Per-Mite outboard audio CW filter which I highly recommend.  Managed 23 contacts during the 2 hour event on 20 and 40 meters. Had a blast.

73, Bill NZ0T

Re: Enclosure #parts

John
 

Jack,
I used the large cake from Harbor Freight and it has worked well.  It's not exactly watertight anymore after several revisions to my grand plan, but it works.  I used a Lexan sheet from the Home Depot and my Dremel drill press to machine the Lexan.  The fan is an old PC CPU fan with an on/off switch, ferrite beads, and a 10k ceramic resistor to slow it and handle rfi.
73s
John W5JXN

Re: Enclosure #parts

Jack, W8TEE
 

Very nice!

Jack, W8TEE

On Wednesday, June 27, 2018, 12:01:17 PM EDT, cfd244@... <cfd244@...> wrote:


Jack,
I used the large cake from Harbor Freight and it has worked well.  It's not exactly watertight anymore after several revisions to my grand plan, but it works.  I used a Lexan sheet from the Home Depot and my Dremel drill press to machine the Lexan.  The fan is an old PC CPU fan with an on/off switch, ferrite beads, and a 10k ceramic resistor to slow it and handle rfi.
73s
John W5JXN

Re: Easy, Inexpensive Cooling Fan, Excelway Case

Jack, W8TEE
 

Yep. I already bought some for that very purpose!

Jack, W8TEE

On Wednesday, June 27, 2018, 11:31:30 AM EDT, Michael Babineau <mbabineau.ve3wmb@...> wrote:


If the fan is generating RF noise,  that can often be cured but putting ferrite beads on both of the leads as close to the body of the fan as practical.
RF has a way of sneaking around on DC power leads if you are not careful. 

Cheers

Michael VE3WMB

Re: Enclosure #parts

Jack, W8TEE
 

"Just an idea."

But a good one!

Jack, W8TEE

On Wednesday, June 27, 2018, 11:11:49 AM EDT, M Garza <mgarza896@...> wrote:


Jack, 
You could use a single sheet of aluminum metal stock, and mount the PA transistors to that.  It could have a lip that the acrylic could bolt onto.
You could use aluminum angle stock to make the lip and just bolt the acrylic and aluminum sheet to it.  If you have a way to bend 
the aluminum sheet metal, you could just fold in the lip on it and make it out of 1 piece of aluminum.  You could put it on the side that will be exposed to allow the air to circulate.  

Here is a very bad ASCII drawing:

=========================     <- Acrylic sheet
                                                ---|     <- Aluminum lip (aluminum angle stock or folded metal)
                                                    |      <- Aluminum sheet stock
                                                    |
                                                    |


Just an idea.

Marco - KG5PRT



On Wed, Jun 27, 2018 at 9:52 AM Jack Purdum via Groups.Io <jjpurdum=yahoo.com@groups.io> wrote:
I will probably upgrade the heat sinks and the fan will be mounted either on the top or the interior side of the case. I'm not a big fan of top vents for cooling. I may mount a small speaker on the top with holes for that, but the speaker will be "sealed" to the top. (The larger Apache case will likely have a vertical separator, with the paddle, headphones, and battery pack in the other half. I will probably mount the fan on that vertical partition. That way, if I spill something or it's starts raining, liquid won't get into the xcvr section of the case.) I will need some kind of cooling as the JackAl board draws enough current to heat the regulators up a bit.

Jack, W8TEE

On Wednesday, June 27, 2018, 10:39:39 AM EDT, Doug W <dougwilner@...> wrote:


On Wed, Jun 27, 2018 at 07:27 am, Jack Purdum wrote:
need a way to cool the PA's with some kind of fan, but without destroying the watertight nature of the case
I'm assuming you will be operating with the case open.  I haven't done the math but I would think unless you fall asleep on the ptt or your key I doubt you would need anything more than some vent holes in your acrylic plate.  You could upgrade the heat sinks for insurance.  If you really want a fan why couldn't you just put in the acrylic?
 
--
www.bitxmap.com

Re: Enclosure #parts

Bill Watkins
 

All nice builds!   Enclosure choices at:  

www.contextengineering.com

Re: Enclosure #parts

Arvo W0VRA
 

On Wed, Jun 27, 2018 at 08:11 am, M Garza wrote:
You could use a single sheet of aluminum metal stock, and mount the PA transistors to that.
One consideration for that kind of design is the managing moisture on the inside of the enclosure.  The PA transistors could end up being the coolest part of the the inside of the case which would cause condensation on them.  Having wet PA transistors might be a problem when keying up TX.

Re: Raduino / bitx 40

dl2qa@...
 

after building trx in case .Display Shows nothing.
No vfo Output no rx/tx
can anyone help. ??

Re: Raduino / bitx 40

Doug W
 

On Wed, Jun 27, 2018 at 10:10 am, <dl2qa@...> wrote:
Display Shows nothing.
Nothing is a vague description.  Do you mean the display does not light up at all or it lights up blank or it lights up and displays something but not what you expected or something else?  The more information you provide the more help you will get.  If you are not sure how to describe what is happening a picture could help.
 
--
www.bitxmap.com

Re: #ubitx safely putting on tight tuning knob #ubitx

Rob Bleumer
 

Ls 
My solutio  for the fragil tuning knob:
Put a push switch parallel to the switch of te decoder (Enter) and velten beneath the tuning knob. 
Than t doesnot change the frequency if touched.
Much easyer to work with.

Re: Enclosure #parts

Larry Smith
 

How about the Peltier Cooling Device for an idea.  Exhaust the hot air through a check flap/valve idea
73
Larry
WA9DOH

On Wed, Jun 27, 2018 at 9:27 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I'm thinking about using an Apache case from Harbor Freight. However, I need a way to cool the PA's with some kind of fan, but without destroying the watertight nature of the case. I'm going to use a clear acrylic top for all external connectors/controls. I'm pretty sure there will be enough room for a battery pack, too.

Jack, W8TEE

On Wednesday, June 27, 2018, 10:08:02 AM EDT, Jamie Anderson <jamiea@...> wrote:


I really like that look.  Where did you get that briefcase and how did you create the front face metal panel?  

I am toying with the idea of a setup like that or maybe an ammo box setup where I build a metal panel to hold the radio either facing the long side like yours or possibly facing the edge like a typical radio so I can maybe throw a mobile dual band rig in there with it. I'm not sure where I will end up yet.


Re: Worked the SKCC Sprint with my uBITX

Bill Cromwell <wrcromwell@...>
 

Hi Bill,

I finally connected my computer sound card and started Spectran to serve as my CW filter. I works great. But! I had forgotten about the processing lag. When I tapped the key the dit didn't come out right away. I remembered in a big hurry. Later I plugged in my NEScaf and that did the job without the lag.

73,

t'uther Bill KU8H

On 06/27/2018 11:41 AM, Bill Carpenter wrote:
I used my uBITX in the SKCC sprint last night and it performed very
well. I have the ND6T click kit installed but have not done the AGC kit
yet so I had to ride the volume control a bit! I used a Four States QRP
Hi-Per-Mite outboard audio CW filter which I highly recommend. Managed
23 contacts during the 2 hour event on 20 and 40 meters. Had a blast.

73, Bill NZ0T
--
bark less - wag more

Re: Enclosure #parts

Jack, W8TEE
 

Probably a higher power draw than I want.

Jack, W8TEE

On Wednesday, June 27, 2018, 1:33:37 PM EDT, Larry Smith <815cpu@...> wrote:


How about the Peltier Cooling Device for an idea.  Exhaust the hot air through a check flap/valve idea
73
Larry
WA9DOH

On Wed, Jun 27, 2018 at 9:27 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I'm thinking about using an Apache case from Harbor Freight. However, I need a way to cool the PA's with some kind of fan, but without destroying the watertight nature of the case. I'm going to use a clear acrylic top for all external connectors/controls. I'm pretty sure there will be enough room for a battery pack, too.

Jack, W8TEE

On Wednesday, June 27, 2018, 10:08:02 AM EDT, Jamie Anderson <jamiea@...> wrote:


I really like that look.  Where did you get that briefcase and how did you create the front face metal panel?  

I am toying with the idea of a setup like that or maybe an ammo box setup where I build a metal panel to hold the radio either facing the long side like yours or possibly facing the edge like a typical radio so I can maybe throw a mobile dual band rig in there with it. I'm not sure where I will end up yet.