July 10, 2024. De Soto, KS. 97°F.
I was standing at the base of a 320-foot tower, watching the pressure gauge on an rfs dehydrator sink like a slowly dying houseplant. 7.1 psi at noon. 6.4 at one. 5.2 by three.
Somewhere up there, there was a kink in the rfs coaxial cable that I could have sworn wasn't there when we terminated it. And somewhere in my memory, I kept replaying the conversation where I told my manager: "Sealed system. It'll be fine."
That was three days earlier. This article is about how I got there — and the $1,200 mistake you might be able to skip.
The Equipment Was Right. I Wasn't.
Our company, a small wireless ISP in Kansas, had just won a new point-to-point link. The feedline needed a dehydration system, so I placed an order for an rfs dehydrator and rfs coaxial cable. The gear shipped from the RFS facility in De Soto, KS within 24 hours. Boxes arrived clean, labels correct, no missing parts.
rfs makes a wide range of RF products — antennas, cellflex cables, filters, RET controllers, GDTs — and we'd standardized on them for years. In my opinion, that's exactly where my brain took a vacation. The equipment looked so reliable that I assumed the installation would be just as reliable.
The spec sheet said to pressurize the system to 7.1 psi. I want to say there was a table in the manual with a note about longer runs. I skimmed it. 320 feet felt like a normal run for a regional ISP. It's not a jump line. It's a full tower run. And the number 7.1 psi stuck in my head as "the answer" instead of "a starting point."
The $95 Test I Declined
The tower crew arrived on a Thursday. Before hoisting the feedline, the crew lead asked: "Do you want us to pressure-test this section before we pull it up?"
Cost of the test: $95 in ground time.
My answer: "Nah. It's factory-new. We'll pressurize after termination. Faster."
Faster, yes. Smarter, no.
What I didn't know: the crew had a habit of bending flex cable sections too tightly during the pull. Not maliciously. Just... casually. One section near the top ground kit got kinked. The outer conductor cracked. Water found it in 48 hours.
The Failure Wasn't What I Expected
I was mentally prepared to call the De Soto support line and say, "Your dehydrator is broken." It wasn't. The rfs dehydrator was doing exactly what it was supposed to do — it detected the pressure drop, kept charging, and flagged the fault when it couldn't hold 7.1 psi.
The rfs coaxial cable was fine, too. What I mean is: the cable material was fine. The kink was an installation error, not a manufacturing defect. The cellflex jumper was fine. The GDT was fine. Everything was fine except the workmanship.
Put another way, I had a closet full of high-quality equipment and one sloppy installation detail. The equipment was never the risk. I thought I was buying reliability. Reliability wasn't in the box.
Why "rfs vs Crown Castle" Is the Wrong Question
While waiting for the rework crew, a customer email landed in my inbox with the subject line "rfs vs crown castle."
My first instinct was to draft a spec-by-spec comparison table. rfs antennas. rfs filters. rfs RET controllers. I was ready to defend the whole lineup, as if Crown Castle were some kind of competing equipment vendor.
Then my manager — who has been in this industry since before I was born — read the email and said:
"Crown Castle is a tower company. They lease space. They don't make equipment. This customer is asking whether they should build their own site with rfs gear or lease a Crown Castle tower. That's a lease-vs-build decision, not a vendor comparison."
The conventional wisdom is that "vs" questions are about competing products. In practice, they're often about competing solutions. I spent 40 minutes preparing the wrong answer because I didn't ask what the customer was actually comparing.
Also, per FTC guidelines (ftc.gov), comparative claims require substantiation. Even if we wanted to say "rfs is better than Crown Castle," we couldn't — it's not a valid comparison. rfs makes the gear. Crown Castle owns the real estate. Many Crown Castle towers are full of rfs equipment. They're not rivals. They're ingredients in the same recipe.
The $1,200 Summary
Here's the arithmetic from this mess, partly so I can laugh about it:
- Pressure integrity test skipped: saved $95
- Replacement flex cable section: $42
- Expedited shipping from De Soto, KS: $28
- Truck roll for rework crew: $340
- Rework labor: $720
- Total cost of a decision that saved $95: ~$1,200
And that doesn't include the weekend of stress or the customer's patience running thin.
Worth mentioning: the replacement pressure gauge went out via USPS Priority and took two days. According to USPS pricing effective January 2025, a First-Class Mail letter costs $0.73. Not that I needed a letter — I needed a gauge. But it reminded me that the shipping speed was never the bottleneck. The missing test was.
The 12-Point Checklist That Should Have Been There
This was my third significant mistake in this industry. After that, I built a 12-point checklist. It's not pretty. It lives in a shared folder. But every feedline install gets checked against it:
- Verify spec-sheet assumptions against actual cable length.
- Calculate expected system volume before setting dehydrator pressure.
- Pressure-test every feedline section pre-hoist. No exceptions.
- Protect flex cable bend radius during pulling.
- Confirm ground kit torque before termination.
- Hold pressure for 24 hours after termination before declaring success.
- Document the exact dehydrator setting in the site log.
- Take photos of the pressure gauge at 12 and 24 hours.
- Notify the next shift about anything below spec.
- Never skip the pre-test because "the contractor is already here."
- If a customer says "vs," ask what they're actually comparing.
- If the answer is "lease vs build," route that conversation to finance before engineering.
We've caught 47 potential errors using this list in the past 18 months. Not all would have become disasters, sure. But one — a loose connector that would have required another tower climb — was caught on a Friday afternoon. That climb alone would have cost more than the whole checklist process.
The Lesson That Doesn't Fit on a Brochure
Everything I'd read about rfs dehydrators called them robust, sealed, maintenance-friendly. All true. But the equipment was never the variable. The installation was. The 7.1 psi number was a starting point, not a universal answer. The pre-install test was an insurance policy, not an optional line item.
Now I'm the person who makes new technicians read the 12-point list out loud before every install. They roll their eyes. Then they thank me when the dehydrator holds 7.1 psi for six months straight.
In my experience, writing about your own failures is the cheapest consulting service you'll ever hire. It turns one expensive mistake into everyone else's free checklist.
5 minutes of verification beats 5 days of correction. I've paid both. I know which one I'd rather bill.
