Re: Fw: Re: [BITX20] Digi-Key¡¯s KiCAD library
#kicad
I think I've tried everyone out there Craig, and I keep coming back to Kicad ... been using it since 2003. Like any open-source platform it has some teething problems from time to time. I avoid most of these by using a win64 prebuilt install (the latest STABLE one). If you are into unix/linux you have more flexibility, but also more head/heartaches.
|
Re: Unwanted radio, yet SHIPPED!
Mike, If you show only one Paypal payment, you'll only get 1 unit. I would assume 4 payments would shine out like a SORE THUMB (I know they would on my account LOL! Contact link is hfsignals@...?- note that with a backlog of 2000+ units, you are one of the LUCKY ones ... even if it doesn't feel like it !
|
Re: #ubitx SSM2167 mic compressor speaker feedback issue - resolved
#ubitx
Thanks for the great post!? I ordered a couple of these myself and have been trying to figure out how they wire up with an electret mic.? This probably just saved me a ton of headache.? I had a couple questions on your setup.
Do you need a DC blocking cap?
Does the 4.7K resistor provides VCC for the chip from the mic bias, or do I need to provide VCC separately?
The 47K resistor you mentioned is between the D7 Raduino wire and the header pin connected to the purple wire, and is not pictured, correct?
|
Re: Unwanted radio, yet SHIPPED!
|
Re: #ubitx Shocks and vibration proofing the uBitx
#ubitx
https://www.amazon.com/3M-Scotch-Weld-Epoxy-Potting-Compound/dp/B000X5G6O6/
|
Re: Unwanted radio, yet SHIPPED!
If you paied 4 times you are in line for 4 units.
Took the following txt from the wesite and to me it id clear were to send my email if needed.
------------------------------------
If you need information specific to your shipping, billing and other commercial matters, you can drop us a mail to hfsignals¡¯ inbox at gmail. The mailbox is in the name of hfsignals followed by the regular gmail.com.
-----------------------------------
--
Ad, PE1GIJ
|
Re: RS-918 vs Elecraft K2 on cw
I had actually meant to post this on the RS-918 group. ?I have too many tabs up!
I have a uBitx, configured for cw. ?The RS-918 is much more versatile and pleasurable to use on CW. ?I'm having fun working on the uBitx but honestly, it is nowhere in the same league for cw. (I haven't tried SSB or digital on either.)
Howard K4LXY?
|
Re: Unwanted radio, yet SHIPPED!
UBitx or BITX40?
On Apr 5, 2018, at 10:26, Mike K0JTA < mike@...> wrote:
toggle quoted message
Show quoted text
I had initially placed an order for a BITX, then canceled this order.
(Or, so I had assumed and hoped...)
Today, I received a notice from PayPal that MY ORDER HAD BEEN SHIPPED (and paid for.)
In looking through my email's trash, I see that I have a total of FOUR order numbers!!!!
When I went to the web site ( ), I was unable to find any way to contact the maker of the unit(s) that I apparently have on order.
On the PayPal order/shipping email, I finally did spot am email address!!? This is the wrong way to "allow" a customer to make contact, I must say.? The email address in my PayPal invoice/shipping statement is:?
teamhfsigs@...
-Is this correct?? Are there other means to
contact the seller of the radio??
In my trash, I (finally) noticed that I had FOUR order numbers!!!!!!!? -Does this mean that I will be getting three more PayPal invoices?????
Thank you!? Mike, K0JTA
|
Re: RS-918 vs Elecraft K2 on cw
Howard K4LXY
But, since this is the BITX discussion group...how do these much more expensive
radios compare with your BITX40 or uBITX transceivers?
Arv? K7HKL
_._
On Thu, Apr 5, 2018 at 9:10 AM, DrZ <zehrhj2@...> wrote: I've been doing some rough comparisons between these two rigs.? I find the RS-918 much easier to listen to due to the DSP NR that reduces background noise.? They draw about the same current on receive, but in my initial test, the 918 drew less on Xmit (I plan to recheck this as soon as I get an ammeter built into my power supply line).? Receiver sensitivity seems comparable.? The K2 of course has no band scope though its tuning knob is more comfortable overall ?(due, in part, to the replacement tuning knob I have on the K2).? The K2 offers more band width choices, but I find the 300 on the 918 to work nicely for most things.
Though I love Elecraft, I'm guessing I may sell the K2 at some point.
Howard K4LXY
|
Re: Fw: Re: [BITX20] Digi-Key¡¯s KiCAD library
#kicad
Ashhar and others on this list use KiCAD, so I was thinking of learning to use that. This is akin to asking which baseball team is the best, but what is your favorite EE CAD package for drawing something bigger than an audio filter and smaller than a bread box? That¡¯s a subjective question to ask a bunch of tech people, but I¡¯m curious about what y¡¯all think.
73 de w9ctw
|
RS-918 vs Elecraft K2 on cw
I've been doing some rough comparisons between these two rigs. ?I find the RS-918 much easier to listen to due to the DSP NR that reduces background noise. ?They draw about the same current on receive, but in my initial test, the 918 drew less on Xmit (I plan to recheck this as soon as I get an ammeter built into my power supply line). ?Receiver sensitivity seems comparable. ?The K2 of course has no band scope though its tuning knob is more comfortable overall ?(due, in part, to the replacement tuning knob I have on the K2). ?The K2 offers more band width choices, but I find the 300 on the 918 to work nicely for most things.
Though I love Elecraft, I'm guessing I may sell the K2 at some point.
Howard K4LXY
|
Unwanted radio, yet SHIPPED!
I had initially placed an order for a BITX, then canceled this order. (Or, so I had assumed and hoped...) Today, I received a notice from PayPal that MY ORDER HAD BEEN SHIPPED (and paid for.) In looking through my email's trash, I see that I have a total of FOUR order numbers!!!! When I went to the web site ( ), I was unable to find any way to contact the maker of the unit(s) that I apparently have on order. On the PayPal order/shipping email, I finally did spot am email address!!? This is the wrong way to "allow" a customer to make contact, I must say.? The email address in my PayPal invoice/shipping statement is:? teamhfsigs@...-Is this correct?? Are there other means to contact the seller of the radio?? In my trash, I (finally) noticed that I had FOUR order numbers!!!!!!!? -Does this mean that I will be getting three more PayPal invoices????? Thank you!? Mike, K0JTA
|
Re: #ubitx Shocks and vibration proofing the uBitx
#ubitx
On Thu, Apr 5, 2018 at 04:58 am, John wrote:
I want to try to avoid field failures due to shocks and vibrations.?
To mitigate shock and vibration getting to the PCB consider something like LORD Micro-Mounts. There's a cute little demo video on that page. I don't know what to expect for pricing or ordering hassles, but here is the distributor page. Potting with hot glue as suggested will help prevent relative movement between toroids and the board; they are only secured with very thin wire and solder.? The heat sinks on the finals are cantilevered masses that will induce strain at the point where the terminals connect to the board; that's where they will fatigue and ultimately break.? The finals themselves are likely very robust against vibration damage so it might be better to mount the heatsink and finals to the case and use flexible wiring to connect them to the PCB, or to put the heatsink/finals?module on its own isolation mount.? Same idea with the Raduino.
|
Re: #ubitx Shocks and vibration proofing the uBitx
#ubitx
Hot glue is your best bet.? Poor man's potting to the rescue.? It holds very well and removes easy enough for repairs and upgrades.? Make sure your cable bundles aren't so tight that they are putting stress on the outer cables in the connectors as they bend into the bundle.? No reason you couldn't also hot glue the connectors in place and the wires coming out as a means of strain relief.
|
Re: Open letter to the uBITX community from Jim Sheldon, W0EB.
#ubitx
do you mean Bill or Jim? Does Jim have a podcast?
|
(superglue)???That's a great idea!!? ?
gordon
toggle quoted message
Show quoted text
Cyanoacrylate (superglue) would allow a quick repair and the toroid parts would be closer together due to a thinner layer compared to the usual two-tube adhesive.
Regards
Lawrence
|
#ubitx Shocks and vibration proofing the uBitx
#ubitx
As I use my rig mainly in portable situations, I want to try to avoid field failures due to shocks and vibrations.?
I am particularly concerned about the toroid coils and maybe the larger electrolytic capacitors.
I have my finals mounted firmly to a larger heatsink attached to the case so they will be ok.
I have some limits as to how much padding I can add as I want to use the rig /PM as well.?
I have also decided to avoid the extra weight of a "Pelican" style case.
So I have three questions:?
1. Are they other components I should be concerned about?
2. What method so you recommend: hot melt glue, epoxy glue, superglue or other method?
3. What about the cables, I have them bundled at the exit of the connectors wherever I could. Any other actions I should take?
Not wanting to hijack the Bitx40 thread about L2-L3.
Thanks and 73,?
John (VK2ETA)
|
Cyanoacrylate (superglue) would allow a quick repair and the toroid parts would be closer together due to a thinner layer compared to the usual two-tube adhesive. Regards Lawrence
On Thu, Apr 5, 2018 at 11:00 AM, Mvs Sarma <mvssarma@...> wrote: However, a broken toroid after having calibrated a coil, If glue repaird, would change its value. Perhaps the inductor value woudl reduce silghtly.? After the suggested gluing, I would recommend to peak the filter for performance.
|
Re: Another uBitx Add-on PCB.
Board complete: : 
|
Re: Another uBitx Add-on PCB.
To my ear the lm324 gave a better result than the TLC274...
I'll start posting out the boards.
73...
|
Don N9GOD
Andrew W6AVC
Craig Wadsworth
Mike K0JTA
Arvo W0VRA
Nick VK4PP
