I have just enough space to rackmount everything. Considering I also have rear rack rails, some less important items can be mounted from the rear. This is all about the ergonomic layout. I may even build some breakout panels for the antenna and audio connectors. I’ll be using a combination of 2U and 3U rack shelves (special thanks to the folks at Gator Rackworks!) I had to go 3U for some shelves in order to get a useable depth. Most of the radio gear will sit on shelves.
The current layout plan (from top to bottom):
ROTOR SHELF 4U
AT-AUTO HI 4U
AT-AUTO LO 4U
2M RADIO / TNC 1U
FLEX VU5K 6U
FLEX 6300 2U
FLEX 6700 2U
AC POWER 1U
PC#1 W7 4U <<< DESKTOP
PC#2 W10 4U
PC#3 SERVER 4U
ASTRON RS-70 4U
I need the radios and amplifier close to the desktop, placing other ‘less touched’ items either down below or up above. I think the ergonomics are OK at this point.
Before I can start building I have to empty the shack so I can remove all the dust. I have a significant dust problem. And the problem was most apparent as I swapped out the cases on the two production PC’s. Choking on dust.
The plan is to empty the room, and mitigate the dust. I plan to use an air compressor to blow off the dust that’s embedded in the stucco-like ceiling, then, I’ll thoroughly vacuum before having the carpet steam cleaned. Going forward I will employ an oversized HEPA filter in the radio room which will run 24/7 to capture all particulates and hopefully eliminate or at least vastly improve my dust problem.
The SPE Expert 1K-FA amplifier allows connection of two transceivers, four antennas, and, an SO2R RX antenna. When the OP is transmitting on radio#1, radio #2 is connected to the SO2R RX antenna. This enables the operator to listen on radio #2 while working the latest DX on radio #1, and vice versa.
SO2R RX Loop Antenna for low noise
Operating in SO2R mode presents the possibility of overloading or damaging the sensitive RX front ends of the two connected transceivers. The 1K-FA manual warns of this possibility and cautions the user about antenna separation and it is suggested (and makes the most sense) that receiver front end protection devices be considered.
The Flex transceivers have built-in RX protection, but adding an RX front end protection circuit offers one more level of protection.
The low noise RX Loop Antenna is hereby considered a major station improvement!
The Expert 1K-FA does all the antenna switching automatically. Fully automated, and carefully programmed, the 1K-FA greatly reduces the chance of user error. The K6HR Contest Station Block Diagram makes this SO2R setup a bit easier to understand.
The transceiver is a FlexRadio 6700 featuring two Spectral Capture Units. I utilize the two SCU’s as “two radios”, each with its own amplifier, tuner, and antenna. I designate ANT1 as the Mosley TA-33-JR-NW (for all HF bands 20 meters and above) and ANT2 as my 130ft Height Compromised HF Dipole for frequencies on 30 down thru 160 meters. Low SWR across all amateur bands!
The cool trick is the operator can move freely through the bands and operate at will via either radio. The 1K-FA’s foolproof switching ensures the TX radio will get the correct TX antenna every time. The second radio, in every case will be connected to the wideband RX loop antenna.
Data Driven via Flex USB
The Expert 1K-FA and the Palstar autotuners operate based on frequency data received from the radio. The 1K-FA and the AT-AUTO autotuners follow the radio in realtime as the operator changes frequency.
The operator only needs to turn the ‘tuning dial’ and press the PTT!
LP-500 Station Monitor
I have installed the LP-500 station monitor with 4 sensors. You could say it takes the guesswork out of getting good reports!
Leveraging the four sensors of the LP-500 Digital Station Monitor, I can ensure both amplifier channels are operating at full output, with the lowest SWR, and best linearity at all times.