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Kees, I have done this with success, I will send a picture soon of how. But basically, remove R70, bridge the front pad to the adjacent track, cut the adjacent track and short the relay sides of both

Great John! Just be aware, I do not know what the true interstage impedances really are. Maybe that has been calculated or stated in the past but I have not seen it that I remember. The actual

Hi folks.... 25 new blank boards for the simple-minded right-sided relay board fix are supposed to arrive from China on Tuesday.? ?If so, I'll re-enable? the Ebay advertisement and up the "count"

Hi All Really sorry to ask this, but I'd appreciate your help setting up my uBitx. I've read countless ways of calibration, from KD8CEC and others on here, but cannot fathom how to get it right. What

Per Warren's suggestion I build a pcb with impedance transformers and I checked before and after and the spurs are very low now relative to pre-filter. I'll post a photo of my installation. John

Pretty impressive differences!

Here we have the eBay filter between a pair of 12:1 transformers (purple) wound 7:2 on a BN-43-2402 core, compared to a pair of 9:1 transformers (blue) wound 3:1, and a pair of 9:1 transformers

Hiya guys, HELP! UBITX Ver4.3 Built..Wiring triple checked. My problem on CW, I press the key and just get a repeat of dot dash and sometimes it takes several stokes of the hand key to repeat the

The only cb ones I have tried on 2 m are the long parallel rod pick up type, they were quite in accurate For VHF/UHF I use ham products made for the purpose Cheers Gordon kx4z

Hi, It might start to be a little shaky on the two meter band. And maybe will work there too. 73, Bill KU8H -- bark less - wag more

Hi There, Labels are one thing. What will happen of you insist on using that CB SWR bridge and meter is that you have an SWR meter:) many SWR meters in ham service are ecpected to handle several

With the heathkits , we’ve already done that, on the surface it seems to work well. http://arrl-nfl.org/wp-content/uploads/2018/01/CreatingAnEmpHardenedTransceiver.pdf

Sorry. David A Posthuma, WD8PUO 1 (616) 283-7703 Sent: Sunday, September 09, 2018 1:14 PM To: [email protected] Subject: Re: [BITX20] Antenna Loops #ubitx-help #ubitx #antennas #loops David A copy of

Hi Allison,? would you be willing to try your load testing again, with the Si5351a driving a set of high impedance loads? say something perhaps 10k Ohms or higher.? -Justin N2TOH? P.S. I'd like to

David A copy of your post to the uBITX group has been forwarded to the [email protected]?discussion group.?? This group was formed to move the long and multiple off-topic posts, mostly about EFHW

I’m using one there is almost identical to the one he suggested. Works fine all bands as far as I can tell. I have used boatloads of different ones throughout the years Those that use toroids

Allsison 9 x 50 = 450 12 x 50 = 600 12(impedance ratio)^0.5 = 3.5(turns ratio) 3.5 x 2 = 7 for integer turns 7 turn primary + 2 turn secondary = 9 turns total. 9 turns is compatible with BN-2402 cores

Output of the uBITX is 50 ohms. Your CB SWR meter should work for the upper end of HF range (20M through 10M) and maybe acceptably good for 80M through 10M. Many of those old CB SWR meters were just

Paralleling filters is not a safe thing to do.? Many too many unpredictable things happen. Also the filter impedance is around 500-650 ohms.?? A 9:1 impedance transformer would get you close and

Arv, Its not DC resistance its RF resistance and RF inductance.? Flat conductors are? better for the latter and need to be wider for the former.? That is the wires with RF. The grounds are to the