Re: BitX 40v3 parts list?
I would be interested in a parts list as well. At our last club meeting one of the new hams said the Bitx40 kit was over his head and he asked if someone else could complete it. So I volunteered.
I noticed no microphone nor speaker, but I have a small 3 inch speaker in my other stuff. I have a spare 8-pin mic for my Alinco DXSR-8T, would that work with this radio ?
Thanks !
--
Jim/N4AAB
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On Sat, Jul 8, 2017 at 10:13 pm, John P wrote:
I thought I read somewhere that the red wire from the volume control connector should go to the input of the AGG, and the output should go to the volume control where the red wire previously went, but I can't find that again either.
Never mind! I found it this morning the answer is in message #21519. It seems like there are a lot of threads about the VU2ESE AGC circuit. Is there a moderator or somebody that could merge all of them? ? -- John - WA2FZW
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Re: No RF Power Output From Bitx40
Yes, I'm getting 12V to the drain when The PTT is pressed
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Thanks, folks. I have the info I needed. Heard first sigs in amongst a pile of static, so progress is being made. Just investigated how to wire the second supplied 3.5mm socket for the mic in a basic no-name mono headset ...
May not be going to respite this month - they don't like colds, let alone 'flu (not surprising, and quite understandable) - so may have more time at home to tinker.
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On Wed, Jun 7, 2017 at 06:47 am, ohwenzelph wrote:
Ok, the 5-2-2017 revised schematic in the wiki makes it clear where to put the agc circuit (instead of just audio in & audio out. "splain it to me like I'm 5 please"
I'm confused too. I can't seem to find the version of the schematic that you referenced; still trying to find my way around here! So much to digest! I thought I read somewhere that the red wire from the volume control connector should go to the input of the AGG, and the output should go to the volume control where the red wire previously went, but I can't find that again either. Is this correct? Thanks! -- John - WA2FZW
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I had converted the same sch into B&W and here it is.
On Sun, Jul 9, 2017 at 2:44 AM, Dexter N Muir <dexy@...> wrote: Is there a circuit diagram with 'hovers' over the components? My eyesight and computer schema do not lend well to viewing the diagram at hfsigs.
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Re: No RF Power Output From Bitx40
Before you yank out the IRF, do this check:
Power the board and final, disconnect MIC and with PTT pressed check if 12V is getting to the IRF drain.
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At 09/07/2017, you wrote: I have some IF510's on order. I hope that's the problem because it will be an easy fix. It's worth a shot.
I've never tried transmitting with this radio without a dummy load attached.
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Re: No RF Power Output From Bitx40
I totally agree with ekelly. I have had almost exactly the same experience with lifting a trace from the top of the board while focusing on the bottom of the board where the solder pads are. The solder was still attached on the top when I pulled it out, lifting the trace back to the inductor coil. I had to make that trace on the bottom side with a bit of wire. The last time I replaced the IRF510, I clipped the leads high, and soldered the new one to the leads sticking up from the board. I'll never have to worry about damaging the board if I need to replace the PA again.
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On Sat, Jul 8, 2017 at 07:00 pm, ekelley wrote:
IRF510 - A tip for those replacing the transistor. Don't try to remove it with a solder sucker. The pins fit
too tightly into the circuit board and unless you have a way of heating all three pins at the same time.
Try this, carefully clip the pins at the bottom of the transistor, if it is dead, nothing lost. Once the transistor
is gone, you can easily remove one pin at a time leaving a clean hole for installing the new transistor.
I replaced three of them and wound up damaging the circuit track on the board. The 510's are inexpensive
and not worth trying to save them, even if you are removing them to test them. They are too sensitive!
Ed
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Re: No RF Power Output From Bitx40
I have some IF510's on order. I hope that's the problem because it will be an easy fix. It's worth a shot.?
I've never tried transmitting with this radio without a dummy load attached.?
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Re: No RF Power Output From Bitx40
IRF510 - A tip for those replacing the transistor. Don't try to
remove it with a solder sucker. The pins fit
too tightly into the circuit board and unless you have a way of
heating all three pins at the same time.
Try this, carefully clip the pins at the bottom of the transistor,
if it is dead, nothing lost. Once the transistor
is gone, you can easily remove one pin at a time leaving a clean
hole for installing the new transistor.
I replaced three of them and wound up damaging the circuit track on
the board. The 510's are inexpensive
and not worth trying to save them, even if you are removing them to
test them. They are too sensitive!
Ed
On 7/8/2017 8:40 PM, M Garza wrote:
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It sounds like the IRF510 is bad.? Do you have a
transistor tester to check it? They are very sensitive.? I still
have not put my radio together, but a bought 10 IRF510s to
experiment with and to have spares.? Good luck,
Marco - KG5PRT?
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Usually, ctrl and + will magnify and ctrl and - will make it smaller.
Good luck,
Marco - KG5PRT?
On Jul 8, 2017 4:46 PM, "Daniel Isaza" < hk4dei@...> wrote: If you're viewing it from the main site, try this direct link to the image file:
then click over it to view full size on your browser, also, every web browser has a zoom function, look for it. Dan.
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Re: No RF Power Output From Bitx40
It sounds like the IRF510 is bad.? Do you have a transistor tester to check it? They are very sensitive.? I still have not put my radio together, but a bought 10 IRF510s to experiment with and to have spares.? Good luck, Marco - KG5PRT?
On Jul 8, 2017 6:02 PM, < Kc3hjp@...> wrote: Ok, just tested it. I have 12v on pin 3 when I key up the mic and I get 5v out on pin 1 when I key up the mic.?
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Re: W8TEE Software Release 1.00
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Re: 80m hexfet power amplifier by W7ZOI
Dear Farhan,
I'm now building the PA but I'm in doubt about the two unmarked capacitors at each side of the input attenuator, should I use 0.1uF each? Thanks. Dan, HK4DEI
On Fri, Jul 7, 2017 at 9:07 PM, Richard Andrew Knack via Groups.Io <ihc73scout2@...> wrote: I had my WA2EBY toroids wound for me by the same guy who does the toroid sets for Elecraft, to Elecraft's approved standards. I am waiting for the rest of the parts to arrive from Mouser, with the exception of the SMD resistors, which are on order from China. The ones from Mouser are on back-order, and won't arrive until NOVEMBER (!), and I really don't want to wait quite that long...
Rich KC8MWG
On Friday, July 7, 2017, 9:04:32 PM EDT, Jack Purdum via Groups.Io <econjack= [email protected]> wrote:
Diz's company, Kits And Parts, is a gold mine for hard-to-find caps and toroids. A friend of mine has one of his One Watters and it's a fun little rig. Keep him in mind when you're building.
Jack, W8TEE
From: Leonard < dredger@...> To: [email protected] Sent: Friday, July 7, 2017 8:23 PM Subject: Re: [BITX20] 80m hexfet power amplifier by W7ZOI
"Yeah, I forgot about Diz. He's good. He also has a toroid kit for the
WA2EBY LPF assembly, but not a cap kit as far as I know...
john
AD5YE"
Diz might put together a mica cap kit for the wa2eby amplifier. Someone would have to ask him. That's how the toroid kit came to be. I asked him. I bought all of the mica caps from Mouser.
Leonard
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It's been posted before, but I still think this is a nice case.
Jack, W8TEE
From: Michael Hagen <motdog@...>
To: [email protected]
Sent: Saturday, July 8, 2017 7:13 PM
Subject: Re: [BITX20] A suitable case ?
Fits like a Glove!?? Jameco, I like them.
They upped the price a buck since I bought.
Warning, the Bottom (White) is Al.
But, the Top (Black) IS STEEL.? I know, I put my speaker there!
No Nibbling on the TOP.? I drilled and then sabre saw, and big
half round file.
By the way, they got an inexpensive Nibbler.? Good for under
1/16" Al?
Mike, WA6ISP
On 7/8/2017 4:02 PM, Jack Purdum via
Groups.Io wrote:
Nope. The TFT
displays are 2.5" high.
Jack, W8TEE
Raj:
Thanks for the tip. ?I wonder if there would be
enough space for Jack Purdum's TFT display?
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
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Fits like a Glove!?? Jameco, I like them.
They upped the price a buck since I bought.
Warning, the Bottom (White) is Al.
But, the Top (Black) IS STEEL.? I know, I put my speaker there!
No Nibbling on the TOP.? I drilled and then sabre saw, and big
half round file.
By the way, they got an inexpensive Nibbler.? Good for under
1/16" Al?
Mike, WA6ISP
On 7/8/2017 4:02 PM, Jack Purdum via
Groups.Io wrote:
Nope. The TFT
displays are 2.5" high.
Jack, W8TEE
Raj:
Thanks for the tip. ?I wonder if there would be
enough space for Jack Purdum's TFT display?
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
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Nope. The TFT displays are 2.5" high.
Jack, W8TEE
From: Craig Wadsworth <cwadsworth@...>
To: [email protected]
Sent: Saturday, July 8, 2017 6:21 PM
Subject: Re: [BITX20] A suitable case ?
Raj: Thanks for the tip. ?I wonder if there would be enough space for Jack Purdum's TFT display?
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Re: No RF Power Output From Bitx40
Ok, just tested it. I have 12v on pin 3 when I key up the mic and I get 5v out on pin 1 when I key up the mic.?
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Re: Raduino v1.18 (improved CW performance) released
Yes the setting at 40Hz is off a bit and same with 50Hz it seems like if i could find a middle ground all would be spot on.
David
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Raj: Thanks for the tip. ?I wonder if there would be enough space for Jack Purdum's TFT display?
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Raj vu2zap
ekelley
N8DAH
Craig Wadsworth