Frodsham Hill

 Just a few photos from a visit to Frodsham Hill last month.

Some antennas on the hotel

 

HF

After 8 years without a HF SSB transceiver of my own, I finally got one at Xmas.

A uSDX which covers 3.5 to 30MHz at <5 watts. It draws 900mA max at 13.8v and 80mA on receive.

Set up a dipole in the loft which is resonant at around 7 and 21MHz, not by design, that's just the amount of wire I fitted in there.

Power output from the uSDX on a 13.8v PSU:

1.8MHz = 4.5w 0.74a

3.5MHz = 3.3w 0.51a

5.3MHz = 3.8w 0.65a

7MHz = 3.0w 0.85a

10MHz = 3.1w 0.52a

14MHz = 2.7w 0.53a

18MHz = 2.5w 0.4a

21MHz = 1.7w 0.37a

28MHz = 3.0w 0.66a 

 

Meshtastic

It's been a while since I posted anything here.

I've been playing with Meshtastic on my T-Beam, quite a few nodes locally.

Also, the usual FT-8 reception, WSPR using the SOTABeams WSPRLite from my car and a few 2-way contacts now and then (4 this year).

 

Helium Mappers

Using a Lilygo TTGO T-Beam to run Helium Mappers software. 100mW on the 868MHz band.

The code is by Max-Plastix

What is Helium ? Seen a load of small vertical antennas going up on nearby houses? Wondering why the price of good coax cable just rocketed? All the important things you need to know are:

1. Paradigm Shift
2. Decentralised
3. Blockchain
   

OLED display comes with the unit but needs soldering on (4 pins)

A professional car installation, perfectly balanced on my phone holder

There's a holder for a 18650 cell but it runs on a USB power bank and no cell

Mapping the A590. This area was previously uncharted territory. Some transmissions are getting across Morecambe Bay from inside the car (see top right, receiving hotspot is at Heysham)

Some good locations in Barrow, getting across The Bay

 

50p Door Intercom

50p from B&Q in the bargain bin. How could I say no?

The blob on a board is to generate an alarm sound.

Equipment List

Just a quick update on what I'm using..

• Yaesu FT-7900 2m/70cm mobile. At home, connected to a 2m dipole in the loft (was in the car, but brought indoors recently).
 

 
• CRT Millenium CB/10m mobile. In the car, with a springer mobile antenna on a Sirio magmount.
 

 
• Yaesu FT-4X(E) 2m/70cm handheld. This is my main handheld radio for analogue FM.
 

 
• Retevis RT8 VHF DMR handheld. Very similar to the TYT MD380 (same firmware and programming software). 
 

 
• Wouxun KG-699E 68-88MHz handheld, covering the 4m amateur band. 
 

 
• Uniden UBC-3500XLT handheld scanner. 
 

• SDRPlay RSP1A software defined radio (receiver). Used for all bands, but at the moment it's my only receiver for SSB and data modes, so is often being used for receiving FT-8. 
• The HF antenna is a dipole in roughly an L shape (no particular length), with one side along the gutter and the other sloping down to the garden fence.

• Baofeng GT3 2m/70cm handheld. 

Retevis RT-8

Got the VHF version of the Retevis RT-8 DMR handheld for Christmas. There it is alongside my Uniden UBC3500 on a trip to Newcastle last month. 

Nandos