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Re: RD16HHF1 in the uBITX #ubitx
Try this old post: ? ??/g/BITX20/message/40216
By Jerry Gaffke · #42366 ·
Re: RD16HHF1 in the uBITX #ubitx
It's a heat resistant tape that's flame resistant and good to 600F (intermittantly). I know it's also used with heating elements and is used by some on their 3D printers. I bought it 'cuze I have
By Vince Vielhaber <vev@...> · #42365 ·
Re: Variable power control
Also I cannot read the values of the Caps due to pixelation.? Could you provided those values.
By Walter · #42364 ·
Re: Variable power control
Could you provide the number of the transistor?? Yes, I am that needed.? LOL Thanks
By Walter · #42363 ·
Re: uBITIX Shipped
Mine shipped same date, picked up Hyderabad 16:38 their time on the 19th - took 24 hours to get to Bangalore (got there 1646 on the 20th) and got hung up in Bangalore for some reason. Finally left
By Jim Sheldon · #42362 ·
Re: RD16HHF1 in the uBITX #ubitx
Eric, Couldn’t find your earlier link to “Cash’s video”. Could you re-post. Thanks Mike K5ESS Sent: Wednesday, February 21, 2018 12:07 PM To: [email protected] Subject: Re: [BITX20]
By K5ESS · #42361 ·
Re: Variable power control
So do I need both the 10k ohm resistor from c1 to ground and the make before break rotary or just one or the other?
By Walter · #42360 ·
Re: Connectors
Paul: I ordered the connector shells/hoods from Tayda. "Housing Connector 2.54mm" Pins 2, 3, 4, 5, 8, 12 Part # A-826, A-827, A-828, A-829, A-832, A-835 Ordered a mix of sizes (+/- 300 total).
By James Lynes <jmlynesjr@...> · #42359 ·
Re: uBITIX Shipped
uBITX ordered on 12-23-2017. Received shipping email on Mon, Feb 19, 2018 5:29 am with DHL tracking number. It was delivered to me on Wed Feb 21, 2018 11:55am. That was definitely worth the
By WA9GQT@... · #42358 ·
Re: Variable power control
2 more things, a 10k from + of c1 to ground will stop voltage screaming to the rail while changing it with power on. if you go to a rotary make sure it is make before break and the spike wont happen.i
By LKNDAVE <novatronix@...> · #42357 ·
Re: Variable power control
THE ZENERS SET THE PASS VOLTAGE OF THE 100 VOLT 10 AMP DARLINGTON. sorry caps lock. they are 1 amp devices but the transistor slaves them to 10 amp handling. i have used this ciruit fo over 40 years.
By LKNDAVE <novatronix@...> · #42356 ·
Re: RD16HHF1 in the uBITX #ubitx
Thank you Eric, for the very valuable tips, can't wait to try it out. How do you protect the other components from the hot air? 73! George VE7WQ Wednesday, February 21, 2018, you wrote: EK> It's
By VE7WQ <v@...> · #42355 ·
Re: Testing 1:1 Ferrite Transformers
If you were to measure the actual impedance, you would probably find that the transformer is reactive (imagine that! ). You might try a little capacitor across the windings to counter that. Dr.
By K9HZ · #42354 ·
Re: Variable power control
Zeners probably wont work for this application by themselves because the loading requirements are too great. They may work as drivers for higher current transistors though. Dr. William J. Schmidt
By K9HZ · #42353 ·
Re: rv2- messed up setting and txing like mad!!!
Jerry. I was reading an article I mistook RV1 for RV2, got into a panic and before I knew it I was in the "Keeck" as we say in Scotland :-) Tiredness, panic and daftness. I will now go and stick the
By Alan -MM?WXT · #42352 ·
Re: RD16HHF1 in the uBITX #ubitx
Looks fine. Mine is from Michael's rated at 360w. It was $20. WalMart might even be cheaper. They're probably all nearly identical. Mine looks like the one you show except for packaging details. BTW,
By Eric KE6US <eric.csuf@...> · #42351 ·
Re: Second batch of uBITX shipping? #ubitx
Okay here's my Story. Order on December 22, late in the day. Knew it would be a while, but paid $10 for DHL delivery anyway. Fast Forward to Monday February 19, the day before yesterday. Checked
By Dennis Voorhees · #42350 ·
Re: RD16HHF1 in the uBITX #ubitx
Thank you Vince, I have a roll of kapton tape here, bought it for general insulation purpose. It'l be handy for smd work then. 73! George VE7WQ Wednesday, February 21, 2018, you wrote: VV> Yes,
By VE7WQ <v@...> · #42349 ·
DDS/VFO output #bitx40
I'm working on a Bitx40, that was initially purchased without the Raduino; but now I have a Raduino and I need to verify that the DDS is correctly driving the mixer. On the Bitx40V3 schematic, I
By Gavin Jacobs - VE7GSJ · #42348 ·
Re: rv2- messed up setting and txing like mad!!!
Don't get me wrong, I applaud your willingness to reach in and play with your uBitx. That's what these rigs are all about. Just taking the opportunity to let others in the forum know that twiddling
By Jerry Gaffke · #42347 ·