[DARARepeater] TNG - Thursday, January 15 - Copper Mountain Technology VNAs.

[Mark Erbaugh]

DARA Clubhouse, 6619 Bellefontaine Rd. Dayton, OH 45424.  The meeting begins around 7pm. 

This week Jeremy Hong, KD8TUO will give a presentation. The presentation starts around 7:30.

Title: Copper Mountain Technology VNAs: High Performance VNAs, but not without controversy. 

Abstract/Description: In this talk, I will discuss a modern high-performance vector network analyzer that I recently acquired on the used market. Also, I will discuss some interesting personal history with this VNA brand and interesting geopolitical controversy surrounding the brand.

Next week, (1/22) Steve Coy, K8UD will discuss the upcoming TechFest (2/14-15) and show off the kit the kids will build. He is redoing the assembly instructions as the ones that come with the kit are poor. He has come up with 3 different methods and at the presentation, TNG volunteers will build each method to see which works best.

We are looking for presentations. If you have something you would like to share, please let me know. 

73,
de Mark, N8ME

License Exam Quiz #353

de Steve, AE8AT 

The questions this week all involve symptoms of a station that is not well configured or operated within optimal ranges.

T7B11 What is a symptom of RF feedback in a transmitter or transceiver?
A. Excessive SWR at the antenna connection
B. The transmitter will not stay on the desired frequency
C. Reports of garbled, distorted, or unintelligible voice transmissions
D. Frequent blowing of power supply fuses

G8A10 What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?
A. Signal distortion caused by insufficient collector current
B. The transmitter’s automatic level control (ALC) is properly adjusted
C. Signal distortion caused by excessive drive or speech levels
D. The transmitter’s carrier is properly suppressed

E7B07 Which of the following is the likely result of using a Class C amplifier to amplify a single-sideband phone signal?
A. Reduced intermodulation products
B. Increased overall intelligibility
C. Reduced third-order intermodulation
D. Signal distortion and excessive bandwidth


Answers:
T7B11 = C
G8A10 = C
E7B07 = D

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