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QST Feb ‘78 p22 BC-Band Energy — A Rejection Filter W3NQN does this look one could transmit thru it?

Ah good to know ...Since I'm the only one that mentioned "in? passing" that I modeled Q90 circuitry (part of the PA chain last I looked) in the hopes that "someone else" might to choose to model it

tek p6100 > extended bandwidth 2215a scope Jim

Hi, It's easily used field portable with the BitX20 or the uBitX or other small field portable radios. Can you see that these radios are not intended to be assembled and then sit on a shelf someplace.

What does this have to do with BITX20? Thanks, Jim K0HW

Hi Fabian, sure I used my multi-meter to test connectivity before I sent my message and I also have? the FCI chip. Please have a look onto attached picture, which shows my Raduino board. You can

Did a count and nearly 50% of the posts in thsi string have nothing to do with: amplifier chain design - best practices. About DBMs, DBM drive levels Low pass filters Spectrum analyzer and probes. K2

RCBG/Carl, R.E. has an opinion.? Venders supply fact. Home brew is speculation and requires testing. uBitx uses the latter, until tested its all a guess.? WHile patterned after many the transformers

Ok yes it was the one post i have write an when load up was deleten i have forget to write it again.. Here re the information from the lost posting Power supply is 12v 3amp or batterypack of 8x1,5v

The small units ....... https://youtu.be/io2eqepRB6g ? https://sites.google.com/view/pd0lew/projects/rtty ? Best, Johan

As I recall, several here have posted that the LO input to the DBM should be about 7 dBm.? That agrees with the following DBM tutorial I found online:

KD8CEC? 3.2 files Download this file https://github.com/phdlee/ubitx/releases/download/1.1/UBITX_Nextion_GUI_V3.zip Extract Ubitx_32.tft for just the tft or Ubitx_32.him for the him file. Marty --

Prototype for the MMIC based bi-directional amplifier replacement. That is not the actual MMIC.... still awaiting delivery. But the transmission line boards are here and the isolation caps, bias

Look at KD8CEC firmware updates, they do work with your display, and do fix the keyer subroutine. But if you stay with the straight key, it won't matter much. Ed KC8SBV

What probe are you using? Raj

100% agree Sarma. Almost any microphone will give satisfactory performance across the 300 - 2700 Hz passband used for SSB. Instead of spending huge dollars on high performance microphones, SSB

You might check on the New England qrp club site for their ?switched capacitor filter kit. It has good reviews and is about $35 I think

Ha, well, you indeed may be correct ..Since I didn't save my invoices, (maybe I didn't want to remember) and bought pieces and bits as they arrived I never kept track of exactly how much I spent ( SN

Jim, Your post made me curious. I have an early K2 that I bought and built in 1999. Looking at my invoice, and adjusting for inflation, the K2 is about $100 cheaper today (100 2018 US dollars).

This ...I measured 0.6 volts P-P on the junction or R102/R103 ...thats about 0 dbm ...Not enough for a 'level? 7 ' mixer? (more nearly a sine wave than a square wave? or kinda a sineish square