SmartSDR v3.8.19 and the SmartSDR v3.8.19 Release Notes | SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
SmartSDR v1.12.1 and the SmartSDR v1.12.1 Release Notes
Power Genius XL Utility v3.8.8 and the Power Genius XL Release Notes v3.8.8
Tuner Genius XL Utility v1.2.11 and the Tuner Genius XL Release Notes v1.2.11
Antenna Genius Utility v4.1.8
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
Low output on 6 meters
Comments
-
Mark WS7M... what did you find in your test??
0 -
Don't forget that the FCC limits drive gain to 15db for commercial amplifiers and make sure you take this into your calculations. The PGXL is not like your grandfather's amplifier. :)
For the PGXL, the max output is limited to about 62dbm (about 1500 watts). In order to keep the FCC happy, you will need 47dbm or about 50 or more watts to drive it to 1500 and keep the gain under 15db.
As for heat, the Expert amps do not have Harmonic Load management as the PGXL does. In the Expert, harmonics blocked by the low pass filter just prior to the antenna port are reflected right back into the power amplifier and this can contribute to IMD products (aka, dirty signals).
In the PGXL, the reflected energy is trapped by a high pass filter and diverted to the harmonic dummy load so that this energy does not interfere with the PA at all. When your amp heats up, it is likely due more to reflected harmonics heating up the internal 400 watt dummy load. This also results in a much cleaner transmitted signal.
Using MeFFA also allows for a cooler running amp on constant carrier modes like RTTY, CW and FT8.
0
Leave a Comment
Categories
- All Categories
- 282 Community Topics
- 2.1K New Ideas
- 526 The Flea Market
- 7.5K Software
- 6K SmartSDR for Windows
- 144 SmartSDR for Maestro and M models
- 350 SmartSDR for Mac
- 248 SmartSDR for iOS
- 228 SmartSDR CAT
- 169 DAX
- 352 SmartSDR API
- 8.7K Radios and Accessories
- 7K FLEX-6000 Signature Series
- 1 FLEX-8000 Signature Series
- 839 Maestro
- 43 FlexControl
- 843 FLEX Series (Legacy) Radios
- 787 Genius Products
- 414 Power Genius XL Amplifier
- 274 Tuner Genius XL
- 99 Antenna Genius
- 242 Shack Infrastructure
- 166 Networking
- 402 Remote Operation (SmartLink)
- 124 Contesting
- 622 Peripherals & Station Integration
- 125 Amateur Radio Interests
- 860 Third-Party Software