I spent the day assembling our second Ramsey FM25B.
I spent the day assembling our second Ramsey FM25B.
The first one we had was good but I gave it to someone who wanted FM in the house. The only thing I remember about it that I’d criticize is poor low frequency in the audio. Otherwise it was frighteningly powerful even with the antenna retracted and the power control minimized.
Although also called 25B, this new one seems different somehow, and better! The audio is spectacular. The strength is way beyond the C.Crane, which I purchased as a guidepost so that a certified transmitter could be used as a point of reference. Unfortunately it’s been raining for three days, so I can’t walk the neighborhood with a portable.
Earlier this week I toyed with the C.Crane FM transmitter and found that adding 1/2
wave or full wave antenna lengths finally gets it to the rooms of the house with a minimum of dropouts. I have a hunch that the output is intentionally reduced to safeguard against people who add antenna length.
Thoughts?
kk7cw says
Try the FM30…sah-weeeet
I have had the Ramsey FM-30B for about 3 three years driven by a Behringer Ultrmizer Pro processor. The audio is better than most of the local commercial FMs and the stereo separation in off the chart. It took about 2-3 days to completely finish the kit, if I remember correctly. Well worth the money.
Ken Norris says
CCrane mod
It is … but of course modifying it it will void the warranty. But there’s more …
You can remove the back:
http://www.blogdom.org/archives/000930.php
… or … peel back the sticker on the back. There is an access hole to a trim-pot (labeled ‘VR2’) on the cb right below the antenna connection … with a small screw driver, or better yet a plastic tuning tool, very carefully crank it clockwise to the stop, but don’t break it. Should give you significantly better range, but it might also cause a slight reduction in frequency response, and you’ll probably need to readjust the input volume.
http://www.xmfan.com/viewtopic.php?t=3257
Also correct the antenna length to 54″.
HTH …