SmartSDR v3.10.15 and the SmartSDR v3.10.15 Release Notes
The latest 4O3A Genius Product Software and Firmware
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
- 354 Community Topics
- 2.1K New Ideas
- 618 The Flea Market
- 8K Software
- 3 SmartSDR+
- 6.3K SmartSDR for Windows
- 175 SmartSDR for Maestro and M models
- 413 SmartSDR for Mac
- 267 SmartSDR for iOS
- 252 SmartSDR CAT
- 188 DAX
- 376 SmartSDR API
- 9.2K Radios and Accessories
- 24 Aurora
- 217 FLEX-8000 Signature Series
- 7.1K FLEX-6000 Signature Series
- 923 Maestro
- 53 FlexControl
- 861 FLEX Series (Legacy) Radios
- 897 Genius Products
- 456 Power Genius XL Amplifier
- 325 Tuner Genius XL
- 116 Antenna Genius
- 286 Shack Infrastructure
- 201 Networking
- 445 Remote Operation (SmartLink)
- 140 Contesting
- 759 Peripherals & Station Integration
- 139 Amateur Radio Interests
- 979 Third-Party Software