Originally Posted by ota.dt.man
The lower noise factor of the RC preamps is appealing.
However, there have been reports in the forums of RC preamps needing to be returned for repair.
I'm wondering how prevalent this issue may be among AVS members:
- Which RC model preamp do you own?
- How old is it?
- Has it ever required service? If yes, how many times?
Hopefully, the newer serial # units are less likely to have this issue.
Thanks for sharing your RC experience.
I have the RC9245
Purchased in Dec 2008.
Yes it was serviced.
Details of the service: I think it stopped working in Sep/Oct 2009. However my family and I were getting ready to move so I took down the antenna tower etc so we could move in Dec.
Because it was winter when we moved, and I did not have super motivation to install antennas until this spring, I never did get it repaired until last month.
If I recall, it was $12 to ship and took a couple days to get there. Their techs had it fixed within 1 business day and back in the mail to me. It took twice as long for it to show back up in my mailbox. I guess the cheapest UK international shipping is done in a Vespa or something.
I will be erecting the antenna tower (CM1630) and horizontal stack of 91XG's with 5x boom sections and my Funke PSP.1922 in the next week or 2.
I have to run over to my friends business and grab about 300' of 7/8" (875 series) 75 ohm coaxial line for the optimal location.
Out of warranty repair was £12. Not bad.
To the best of my knowledge it was not a lightning strike that damaged it. I really have no idea. The feedline had a grounding at the top just after the pre-amp. I had a grounding strap on the cable shield at the base of the tower. I also used a 25 pair phone line fused grounding block on the rotator control. I also had appropriate grounding at the entry to my house.
The symptons were:
"The PSU has a light when the switch is on. However, when the LNA and
PSU are removed from the line, there is almost no difference in signal
readings with my meter. I have short cabled the LNA, PSU, and ATSC tv
right at the base of my antenna and there is very little difference
between no LNA and LNA."
Their response was:
"It sounds as though the preamp transistor has gone down. Do you have a way to measure current drawn? If the LNA is taking either no current or trying to take more than 75 mA then the transistor is not working correctly and we'd need to replace it. Providing the psu is delivering 8V then that is fine and there would be no need to return that."
Since mine no longer has a warranty, and it as been repaired, if it happens again, I will crack open the LNA and see if I can get the transistor from mouser or digikey. Much faster repair time and I have a surface mount rework station if it is a PCB inside.
One final note:
Their customer service is outstanding. I'm not sure if Ellen is one of their tech's, or if the tech's give her all the info she needs. But you can ask them any question about the device and she will provide you with a very detailed answer. They are fast to respond via email. Even though the pre-amps may be fragile, I will continue to use it.
Try asking ChannelMaster for additional info about intermod and overload.