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
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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
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Worked the SKCC Sprint with my uBITX
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
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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
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Re: Easy, Inexpensive Cooling Fan, Excelway Case
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
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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= [email protected]> 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? ? --
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Re: Easy, Inexpensive Cooling Fan, Excelway Case
I was in a hurry when I put my fan in so I went with this one 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.  --
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Re: Easy, Inexpensive Cooling Fan, Excelway Case
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?
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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? ? --
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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? ? --
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This is the little briefcase I have.? It came from Harbor Freight:
The board fits with plenty of space.? There is also pleny of space for a battery.? At only $14,?I thought it was a good buy.
Marco - KG5PRT?
On Wed, Jun 27, 2018, 9:08 AM 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.
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Re: Easy, Inexpensive Cooling Fan, Excelway Case
Is the fan quiet, or does the rcvr pick it up?
Jack, W8TEE
On Wednesday, June 27, 2018, 9:53:51 AM EDT, Arvo KD9HLC via Groups.Io <arvopl@...> wrote:
This <$1 50 mm 12V fan... ...fits nicely on the back panel of the Excelway case from Bangood, now on sale for $8.88. 
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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.
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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.
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Easy, Inexpensive Cooling Fan, Excelway Case
This <$1 50 mm 12V fan... ...fits nicely on the back panel of the Excelway case from Bangood, now on sale for $8.88. 
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Thank you for the fast reply. I got to the next page of posts where My post was and read your post above about which one to buy. ?I promptly deleted my post, not promptly enough it seems. ?Thank you and sorry for reposting already asked questions.
Kevin, W8VOS
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Both looking great and worthy ideas no less.
On Tue, Jun 26, 2018 at 10:38 PM, M Garza <mgarza896@...> wrote: Very nice build.? I plan on doing the same thing.? I wanted something that fit in a backpack.? I even have room for a 12v 7AH battery in the case.
Thank you for the inspiration.
Marco - KG5PRT?
Here's my attempt at a 'transportable' uBitX. The box is a 'toy' briefcase and the display is mounted with a ribbon cable on the top surface. The gaps and perforations are for air flow ?as there is a manually switched fan blowing across the heatsinks which is used for continuous digital modes.
73, Aarne?
WY7ATH
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Re: Schematic . . . What Schematic . . mine?
now if I could just remember where I left my damn notebook...
--
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Re: Schematic . . . What Schematic . . mine?
TNX Ashhar . . . Maybe include that in the new instructions?? hihi
Love your work!!!!
Best 73
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Re: Schematic . . . What Schematic . . mine?
TNX Bill and I think Vince did the same thing.
I received some boards from China yesterday that I forgot I'd ordered.
I had to go to Paypal to see what 2 of them were.
Looked liked great boards, but I didn't know what they were. Looked like maybe an amp of some sort..
Yea they were . .? Dynamic mic preamps.
Wired one up to the uBitx and got great audio.
And yes . . . I did make a notation in my notes.
Like they say . . . War is hell . . .so is getting older . . .? HI HI
73 all
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Arvo W0VRA
AdverseYaw