Solar-Terrestrial Data
Last Known Locators
-
Recent Posts
Recent Comments
- Ray on QRP FT8 Operating Tips
- Layne on QRP FT8 Operating Tips
- m0spn on G6LVB (LVB) Tracker
- Luc on G6LVB (LVB) Tracker
- Steve Outen on Over Voltage Protection
Tags
Author Archives: m0spn
OH3SPN FT8 Activity
I’m now active from Tampere, Finland using the call OH3SPN, primarily FT8 on 30/20/17m due to antenna restrictions; FT817 (typically 2.5W out), G4ZLP MinoProSC interface, indoor SPX-100 antenna or short wire connected to LDG Z100 Plus. I’m very happy to report … Continue reading
CQ DE OH/M0SPN
As of April 2018 I’m now located in Tampere, Finland, Locator: KP11UL. You may see my call appearing in various logs with an OH prefix whilst I’m awaiting my official Finnish callsign. I’m currently maintaining both (M0SPN and OH/M0SPN) callsign … Continue reading
Over Voltage Protection
I recently re-homed several cheap 13.8V linear PSUs from rallies, ranging from 3 to 10A. My intention is to power smaller items of equipment; TNCs, FT817s and similar. However, after inspection it became apparent that all lacked any form over over … Continue reading
Hybrid (LSD) NiMH Batteries Compared
Receiving a set of NiCad batteries as a 10 year old (for use in a ‘Knight Rider’ RC car – how awesome was that?!) started a lifelong obsession with rechargeable cells. My interest in batteries started even earlier than this, after being given … Continue reading
Posted in Uncategorized
Tagged battery, cells, eneloop, Hybrid, ladda, maha, NiMh, powerex
2 Comments
Chord DM01 vs Samson Q7
I’ve been very happy with my cheap dynamic mic (a Chord DM01) and have received many complementary reports on my audio. However, having recently been asked to co-present a podcast I needed to confirm the mic was up to the job; … Continue reading
Adventures with Software Defined Radio
Some time ago I purchased an RTL ‘TV’ USB tuner. I was immediately impressed by the way whole chunks of the RF spectrum are visualised; tuning as simple as clicking a signal of interest plus ‘brick wall’ filters by the drag … Continue reading
Multi Band Slinky Doublet
Designing an HF antenna for Swindon Makerspace presented several challenges:- Routing coax from Makerspace to the roof is potentially tricky High external vertical antennas would require lightning protection No convenient external earths available Counterpoises impractical due to size Large horizontal … Continue reading
Posted in Uncategorized
Tagged antenna, atu, doublet, ft817, ladder line, makerspace, slinky, twin feed, wspr
Leave a comment
Introduction to Packet (ax.25)
When starting out with packet I found it difficult to find my way. Several resources exist online but all seem to assume some basic level of understanding, which I clearly lacked. I have to admit here, I’m still new to … Continue reading
RSGB Xmas Cumulatives Contest 2015
Determined to take part in the RSGB Xmas Cumulatives this year, I worked from home on 3 days using completely inappropriate antennas. On 26th December I spent 2 hours hunting around 6m, making only one contact using a dipole antenna. … Continue reading
Posted in Uncategorized
1 Comment