Wednesday, 17 April 2024
A very special Midland 3001 has landed
Saturday, 25 June 2022
Plans to sell refurbished and repaired CB radios
A money-making idea I've wanted to do for a while is repair and sell on older CB radio equipment, as I do have the know how to do this, and will ensure it's done properly, even undoing bad repair jobs done in the past by "rig doctors" and "screwdriver experts" as they are almost always people that claim to know what they are doing but in fact do not, like any transmitting radio a CB radio MUST be set up properly so as to be able to produce up to the legal power output and do it cleanly.
I have been putting together service diagrams to put my plan into action, as I need these, to do the job, I have a spectrum analyser however I cannot just connect a CB radio into it as I need to attenuate the output to avoid blowing it up, so a suitable attenuator is needed, the tinySA website links to one that should do the job, the spectrum analyser is needed to ensure very little of what the CB under test and repair transmits falls within 54-55MHz, as a lot of "rig doctors" will often tamper with the harmonic trap coil not realising why it is there, I need to order a frequency counter and signal generator and though the tinySA works as one it will not go low enough to set up a CB receive section properly.
I also need to order trimmer tools, another thing "rig doctors" and "screwdriver experts" tend to do is use screwdrivers in the variable inductor and transformer cores which breaks them making repairs for people with the right tools hard, most of the time these cores can be turned around and reinserted, which I had to do on my Uniden Uniace 100 (which I'm not planning to sell as it is a personal restoration project).
I have a Zetagi Model 203 power meter, a meter that reads power between 3-30MHz but it still is not the best instrument for the job, it will let me know IF I have peaked each stage of the transmitter correctly and also flag up if the transmitter final transistor is not working as it's been blown by high SWR in the past and the set basically scrapped for that reason alone.
I do have a Philips oscilloscope however it's an older CRT one and I am sensitive to the flicker it produces so do not often use it, so I'd have to get an LCD scope in its place, usually to help sort out the FM discriminator, the Maxon based CBs (Midland and Maxcom and a few others) are known for that going out of alignment.
I also need to get in a SINAD meter, these fetch ridiculous amounts of money on eBay and are often in America and don't stay on for long, so I have to build one, and found a circuit that should do the job and will get parts for that too, this is more to set up the receiver but the service details I found for the Uniden chassis suggests an AC voltmeter across the speaker terminals and the adjustments done for highest reading on the meter, not the best but it seems to work but I would prefer the SINAD meter route and the instrument does not have to be 100% spot on, just as long as it shows the receiver is properly set up.
Some radios are known for failing electrolytic capacitors (my own Uniden Uniace 100 is tarred with that brush) so I need to keep a stock of these, I have a stock of resistors so far but obviously need the other components, sadly some components such as the Sanyo LC7136/7137 and some kinds of transistors are long since discontinued so are close to unobtainable, crystals are also expensive and I'd only buy them IF I come across radios that are out of specification and cannot be pulled up to frequency properly.
On the sale side once the radios come out the other end and I sell them on car boot sales I need to be able to accept payment, many people don't carry cash now so I figured a card reader would be a good option, I can get one for about £30 and it would pair with my phone to connect it to the transaction system, I'm not planning to sell them via eBay, I may attend smaller radio rallies to sell them on too, however most hams by old CBs for conversion to 10-meters and I don't know many people from the CB side of things that will go to these events.
So time to put my knowledge of radio to making money, and promote wider use of CB, it still has a place in 2022 despite the mobile phone being common, and of course unlike mobile phones it is perfectly legal to use CB while driving.
73 de M0WNU/26CT730 (or just red squirrel on CB will suffice)
Friday, 10 June 2022
Update to the Uniden Uniace 100 repair
Thursday, 2 June 2022
Uniden Uniace 100 repair project
Thursday, 26 May 2022
6 years since I was betrayed
- was monitored over P25 radios by the Savannah, GA Sheriff's department abusing said radios issued to the local Civil Air Patrol squadron that he was a member of at the time and the FCC and the Savannah Sheriff's department did nothing even when he admitted it on ##hamradio on the now-defunct freenode IRC network (which he did and also openly admitted the decryption keys were leaked and he took control of them)
- Openly admitted to targeting vulnerable WiFi routers when a flaw in the encryption was leaked, again on ##hamradio on the now-defunct freenode
- Gave a then newly-licensed ham some very irresponsible, dangerous and illegal advice on /r/amateurradio on reddit
- Made false accusations about the 'theft' of a clickbait image going around on reddit that actually had been for many many months prior to that, his modus operandi is generally to make false accusations
- And at one point, for clearly committing a serious violation of the network's rules, he was given a network-wide ban from IRC network Snoonet that had lapsed in August 2019.
Wednesday, 16 March 2022
Blackpool Rally 2022 attendance confirmed and possible activation of Blackpool tower (not with an unfiltered Baofeng)
So I have made arrangements to be at the NARSA rally at Blackpool on the 24th April, I will be spending that weekend in Blackpool at the Norbreck Castle Hotel, and I plan to go up to the top of Blackpool Tower and do some operating, following up on Lewis M3HHY's "Baofeng the fatal flaw" video's technical aspect, that being Baofeng radios lack front-end filtering or it's woefully inadequate, whereas my Yaesu FT2D should be a little better up there but of course all radios are subject to desense from strong out-of-band signals.
So to add some extra help to get rid of the nasty stuff I will be getting hold of a SOTABeams bandpass filter that screws into the antenna socket of the radio and the antenna then screws onto that, the idea here being that this filters out the worst of the offending out-of-band signals, these being broadcast and commercial from the top of Blackpool Tower.
I will be beaconing APRS from up on the tower should I make it up there as my FT2D can do that, of course this depends on weather as the top of the tower is usually closed during really bad weather and my previous visit to Blackpool did not take me up the tower for this very reason and I was hoping this was going to happen in 2020 but certain virus issues got in the way as we know.
I look forward to the weekend and if I make it up the tower and can get through the mush at the top contacting stations far and wide and poitentially as far as GD (Isle of Man) and you'll see my results and the rally on my YouTube channel after the rally
73 de M0WNU
Monday, 31 January 2022
Fun with fitting roof bar mounts for antennas
Sunday, 9 January 2022
New year and a catch up and eBay goodies
Sunday, 24 October 2021
Yaesu FT818 or FT991A? The decision I have to make
Tuesday, 7 September 2021
3D printer now here and a couple of other things
On my last payday I purchased a 3D printer, specifically an Ender 3 Pro which I ordered with a suitable amount of filament to get going, though it came with some filament anyway but only a small amount compared to what I ordered, in both Amateur and CB radio circles a 3D printer is very useful indeed as you can 3D print things like antenna parts and other useful things, one of my first designs was an adaptor to allow my 7-meter SOTApole to sit in my drive on mast stand, I also had a look on Thingiverse and found some SO239 cover caps which are ideal for my radios that are on the display shelves in the shack, though do consider that these radios do get put on air from time to time.
The prior payday I ordered in some Motorola T62 PMR446 handhelds, these seem to work ok and I did a video on the YouTube channel about these, they meet the newer spec of allowing 16 channels here in the UK however that needs activating as they are 8 channel by default.
I also ordered a TinySA which I have yet to finish the video on, and an antenna from Wish that is designed for CB handhelds and is telescopic, which I will be pitting against the Albrecht CL27, the stock antennas on both modern handhelds and the comparable antenna found on my 1980s Realistic TRC-1007, it also came with a magmount so I'll be putting it on the car roof and connecting it to a radio and an analyser to see how it fairs in that regard.
I also hope to look at the new Thunderpole T-600, which I have seen pictures of and know full well who makes it, I already own the PNI Escort HP7120, which is electronically the same radio, but the T-600 appears to use different firmware to allow AM/FM switching on the CEPT channels while in the UK mode, this will possibly be featured after my next payday.
I'll also try and update this more as like everything I have been doing it has been disrupted by a hectic work schedule
73 de M0WNU/26CT730
Friday, 2 July 2021
After many years it may be I get a go in the 144MHz FMAC after all
So it has taken a few years now however luck has it that on Tuesday I will not be working and therefore can take part in the 2-meter FM activity contest after all, this is of course subject to a lot of things, but I will not be changing job, moving house, or suffering clutch failure on the car (the clutch was changed in November due to bearing failure).
I have logging software on my Hi10 Air tablet ready to go and just need to set up the log for the day, filming will be taking place for YouTube and will be on the channel afterwards so you can see how I got on.
Antenna wise I hope to use my tape measure Yagi, radio will be the FTM-400XDE unless for some reason that is not possible in which case I'll use the FT2D handheld which will make me a QRP station in that case however there is some gain on the antenna which may help should the FT2D be needed, I will also be putting a bulletin of my participation on the contest onto APRS earlier in the day.
As every other time I've wanted to do this contest something has gone wrong I have missed out a lot, this is my first go at a contest if it happens and even though I know full well I will never win it at least I can say I've done it.
looking forward to doing well.
73 de M0WNU
Friday, 11 June 2021
There be pirates Cap'n transmitting SSTV on 27.700 MHz USB rendering UK CB channel 11 unusable
Yesterday before work I noticed the conditions down on 11-meters (and presumably 10) were good, tuning to UK channel 11, as you'll see in the attached video clip, I heard SSTV transmitted using USB, which is illegal to do outside of the normal CB frequency range and also on 27/81 which is strictly UK use and FM only (no laws state SSTV cannot be used on CB at all however that I know of), naturally pirate operators generally do not care until the authorities actually catch them, at which point the pirate operator is stripped of all equipment and prosecuted.
So while CB does have its uses, in the UK it is authorised as licence-exempt non-interference non-protected, in short you cannot cause interference to others and you cannot report interference as no action will be taken, so these European pirates sadly will stop channel 11 in the UK from working until they realise this channel is active using FM all the time in the UK.
73 de M0WNU/26CT730
Friday, 28 May 2021
Beginner's guide to CB radio videos now live on YouTube
Wednesday, 26 May 2021
5 years since I was betrayed
So here we are at 5 years since I went to Staines to go to Martin Lynch & Sons for my Yaesu FTM-400XDE, Diamond NR770RSP antenna and Sirio magmount which that antenna is screwed into, unfortunately this day 5 years ago I was stabbed in the back by a fellow ham as you know, Chance Callahan KD0MXN (or is that ex KD0MXN as his licence seemingly expired in November according to the FCC ULS), my belief now is he did it because he believed in his own little sick twisted mind that I was stalking another IRC user that lives in that area which is utter rubbish, why would a ham be in Staines? ML&S of course (unless they actually lived in Staines too).
As you know I feel this young man is unfit to hold any kind of radio transmitting licence (he also holds a GMRS licence which is not something that I am too bothered about because that is not a service used worldwide and cannot propagate worldwide), so why do I feel he is unfit to hold any kind of licence, Amateur or otherwise? here's the list again.
Apart from stabbing me in the back when I went to ML&S 5 years ago he also:
- was monitored over P25 radios while in Savannah, GA by the local Sheriff's department, which he became aware of after the decryption keys were leaked, he openly admitted to abuse of these radios on freenode's ##hamradio and the FCC did nothing
- Openly admitted to planning to attack vulnerable WiFi routers when a flaw in the encryption used on these was discovered and published
- gave a then newly licensed ham some very dangerous and irresponsible, as well as illegal, advice on reddit's /r/amateurradio
- made false accusations about the 'theft' of a clickbait image on reddit, which turned out to be during the rounds for quite some time before that
- and at one point in time was issued a network-wide ban from snoonet, an IRC network attached to reddit in some way, usually IRC channels of various subreddits, that ban lapsed in August 2019.
Sunday, 16 May 2021
YouTube channel project, Beginner's guide to CB radio or at least my way of doing it
Saturday, 15 May 2021
Moonraker Micro CB radio
My recent main YouTube video was on the Moonraker Micro CB radio, which is indeed a compact radio, based on an AnyTone chassis as it turned out so has the 10-meter mode and the naughtiness inside, though of course I have no issue putting this set on 10 it does not have SSB capability and being channelised may require a frequency counter to get an idea what channel is associated with which frequency if you want to use it on 10.
The radio came to me with bare ended wires so I fitted a cigarette lighter plug, rated 5A as this is ample for this radio, to be able to plug it in in the car to do tests, the radio seems to do well, and is good when put against a comparable set, which in my case was a PNI Escort HP7120.
When I did the original bench tests on the radio the power levels were reading lower than expected, however later testing showed it was in fact fine.
Both videos are below
Friday, 30 April 2021
A wee bit of an update
Tuesday, 16 February 2021
MB7UCG goes live on Thursday
I am pleased to announce that MB7UCG will be on air from Thursday, Ofcom confirmed today that they received my email so I can run it from that date.
I was of course planning to run a walkabout test with my FT2D however that cannot happen until the following week as I am doing overtime that day, however I can test it using my car, though this will not be filmed as it is on my journey to work and I have not set up a camera that exclusively looks at my FTM-400XDE's display
I look forward to hopefully running a successful igate.
73 de M0WNU
Saturday, 13 February 2021
Catterick Garrison APRS igate ready to go
I have finalised everything for the new Catterick Garrison APRS igate to go live very soon including the NoV, the callsign for the unit is MB7UCG, the setup is located in my kitchen with the antenna outside on the window ledge on top of a Fray Bentos cheese & onion pie tin, once I have the ok from Ofcom I will be doing some tests however I've not heard anything from Spectrum licencing since they sent the NoV.
I have already put one object onto the igate already and previously placed this on the map using my own callsign and that is the location of the local club, however of course due to COVID-19 we cannot meet physically.
I have remote access to the power supply, as required by Ofcom, to shut the unit down in the event that it is required to do this, and the switch that controls the socket has been clearly labelled, the socket is under the counter with a WiFi controlled socket plugged into it and power to that is switched by a fused spur.
I am reworking the website to hopefully reflect the new igate and when Ofcom clear me to switch it on, I have emailed them but I don't know if they got my emails so I will give them a call Monday morning just to find that out, giving their staff levels will be low due to COVID-19 it might take a while to get a reply.
And there will be YouTube videos coming up on MB7UCG.
73 de M0WNU
Monday, 18 January 2021
First post of 2021 (and in a while), some updates, sterile UV5R, and a livestream on Wednesday
I have not had the time to update this as my work went through its peak period so also that means little in the way of radio.
Firstly the radio camper project is on hold as my spouse has told me I am not to own any product of the Ford Motor Company possibly because of some fire incidents with the Pinto, a US model from around the 70s I believe, so I have to start again from scratch with a vehicle available in the UK that we both agree on, add to that a £300 garage bill for my car in October/November time for a clutch change.
Videos have been coming in short burst and I've started to try and fit in some livestreams where I can, though it's all a learning curve, including trying to keep RF out of the audio chain, I have one coming up on Wednesday.
My latest video has me sterilising a UV5R with a handheld UVC steriliser (which is indeed the real deal) and of course I was very copious with the warnings of the danger of UVC radiation, I am impressed that I managed to find that in a local shop but also worried that people will buy these things and harm themselves due to a lack of understanding of the dangers.
I am still in contract with my current employer for another month at least which is good as I'm putting £10 a week away in my savings (every pay day) to try and save for a 3D printer for both radio and non-radio related projects, watch for that one in the future.
Also hope to get my igate on air under test then unattended NoV in the next few weeks if I can.
That's all for now guys, have a good 2021, hopefully it will be better and rallies will once again be held.
73 de M0WNU