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Messages - 26AM081

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31
Wanted / President Jackson 1 Mk1
« on: October 25, 2021, 09:25:49 pm »
Looking for a President Jackson Version 1 Mk1 preferably in black not silver.

Happy to pay the sensible going rate for one. No mod's. looking for one that's completely original in every detail.

PM me if you have or know of one for sale.

73's Bill


32
Buy & Sell / Airspy HF+ Discovery
« on: October 25, 2021, 07:22:08 pm »
Barely Used / Almost New  Airspy HF+ Discovery SDR Receiver

Complete in box with USB Cable

These are a very high performance SDR receiver Cost £209

More information on these SDR receivers can be found here: https://airspy.com/airspy-hf-discovery/

Selling for £160 £150 ovno May considering posting.

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33
FreeBanding / Radio Merlin 6305 Khz [OFCOM RAID]
« on: October 25, 2021, 08:29:58 am »
Very sad news to hear that radio Merlin on 6305Khz was raided by Ofcom on the 16-09-21.

Apparently Ofcom raided the shortwave pirate radio station on Thursday morning of the 16th. Not much more information at present regarding what exactly took place.


[UPDATE]

Here's a twitter link to RMI Raid by: G4HTZ

https://twitter.com/G4HTZ/status/1438566638664785921

34
Gallery / Re: Sharing my old Radio
« on: October 25, 2021, 08:09:22 am »
Very nice radios the Royce's. Here in the UK we have a very similar looking radio sold under the "Mustang" branding, It was FM Mode only, and operating within our strange frequency arrangement from 27.60125 - 27.99125. Thankfully with now have the Mid Band too with all Modes permitted.

I forgot to ask last time you mentioned your dipole antenna, is it horizontal or vertical polarized?


35
Nets & Skeds / Re: [UK] Sunday Southeast SSB Net - 11m
« on: October 24, 2021, 05:32:59 pm »
This Mornings net (24.10.2021) was chaired by James 26JS07 Portable Bluebell hill, Kent on frequency of 27.285 usb and joined by the following stations:

1.   CT3855 Pete – Bluebell hill Static Mobile
2.   KP441 Steve – Nr Brighton
3.   TM204 John – Longfield X2
4.   AM101 Billy – Burham static mobile
5.   Little Louie – Reigate
6.   AM200 Rob – Maidstone
7.   CT747 Simon – Dartford
8.   BS109 John – Chingford
9.   TE032 Adam – Two tree Island portable
10.   TE11 Alan – Langdon Hills Portable
11.   Osprey Bill – Shenfield
12.   TE003 Colin – Wickford
13.   CT4051 Steve – High Halstow
14.   CT4169 Martin – Hastings
15.   LT727 Dave – Elstree
16.   HL21 Frank – Hailsham
17.   GE03 Dick – Romney
18.   LR004 Tom – Tilbury
19.   TE310 Kevin – Leigh on sea
20.   CD12 Colin – Southend
21.   SS2 Carey – Southend
22.   GE07 Rob – Tenterden
23.    (nocall) Andy – Faversham 

Look forward to hearing everyone next weekend
Thanks to everyone that joined 73

36
Yes hope to work you on the band very soon. Don’t forget we have a WebSDR located not far from London, so you can maybe see if your signal is reaching the UK when conditions are good.

WebSDR http://AlphaMikeDX.ddns.net:8073

37
Hi Sonny, Your have to share a picture of your Royce Radio. I do like those

38
Members Introductions & (Callsign Requests) / Re: Call sign request
« on: October 22, 2021, 08:48:21 am »
Hi Sonny and welcome to the AMDX group. Your call sign will be issued by Admin very soon..

73 DE Bill

39
Buy & Sell / [SOLD] Uniden Uniace 200 [27/81]
« on: October 17, 2021, 02:17:12 pm »
Rather tatty condition Uniace 200, but in fully working order.

Frequency: 27.60125 - 27.99125 UK40

No power lead or microphone included, hence price.

£10


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40
Nets & Skeds / Re: [UK] Sunday Southeast SSB Net - 11m
« on: October 17, 2021, 02:13:01 pm »
Sunday 17th October 2021

This Mornings net was chaired by James 26JS07 Portable Bluebell hill, Kent on frequency of 27.285 usb and joined by the following stations:

1.   AB406 John - Bethersden
2.   TE11 Alan – Hockley
3.   DC05 Dave – Nr Ashford mobile
4.   TE032 Adam – Two Tree Island
5.   CTT331 John – Rye Harbour
6.   CT3855 Pete – Bluebell Hill
7.   AM101 Billy – Detling Hill
8.   CD12               - Shoeburyness
9.   TM  Jerry – Lewes
10.   TE003 Colin – Wickford
11.   TE73 Paul – Langdon Hills
12.   CT9484 Mark – Hazelmere, Surrey
13.   KP441 Steve – Nr Brighton
14.   LT727 Dave – Elstree Hertfordshire
15.   TE67 Jeff – Southend
16.   EY132 Keith – Rochester
17.   Osprey Bill – Shenfield
18.   56/30AT102 Sammy – Finland
19.   CV01 Kevin – Isle of Sheppey
20.   CT4169 Martin – Hastings
21.   315 IA047 Leonid – Eastern Ukraine
22.   CT684 Lee – Chelmsford
23.   SM4PE? Sweden
24.   AM525 Denis – Nr Tonbridge 

Apologies to anyone that got lost in the QRM
Look forward to hearing everyone next weekend
Thanks to everyone that joined 73

41
Buy & Sell / [SOLD] CP-163X-II
« on: October 12, 2021, 05:47:09 pm »
Very nice linear amplifier up for grabs. These are in perfect unmolested condition.

Model: CP-163X-II's
Power Max: FM 150W RMS, AM 170+W PEP, SSB 200+W PEP

These are not technically designed for mobile operating, however you could do so if you wish, but they are much larger than the typical RM type like the KL203 etc.

Built in RF pre-amplifer, and 3 stage power setting control. Also supports 3 input power levels via the rear control knob.

£55 ovvno, may consider posting.

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310-1

312-2


42
Nets & Skeds / Re: [UK] Sunday Southeast SSB Net - 11m
« on: October 10, 2021, 09:06:26 pm »
Sunday 10th October

This Mornings net was chaired by James 26JS07 Portable Bluebell hill, Kent on frequency of 27.285 usb and joined by the following stations:

1. AB406 John – Bethersden
2. CT3699 Dave – Chatham
3. EY132 Keith – Rochester
4. AM101 Billy – Detling Hill
5. CT4051 Steve – High Halstow
6. TE032 Adam – Two tree Island
7. TE11 Alan – Langdon Hills 
8. MH01 Mark – Mobile
9. TE93 Steve – Braintree
10. CT839 Richard – Basildon
11. CT3855 Pete – Bluebell hill
12. TE868 Glenn – Langdon Hills
13. CT4543 Thomas – Whitstable
14. TE67 Jeff – Southend
15. OT01 Ron – Maidstone
16. TM Jerry – Lewis
17. CT352 Kevin – Chelmsford
18. TE003 Colin – Wickford
19. CT331 John – Rye
20. 27HS Pete – Maidstone
21. AM200 Rob – Maidstone
22. GE06 Chris – nr Folkstone

Look forward to hearing everyone next weekend
Thanks to everyone that joined 73

43
General Discussion / Social Media Websites Broken
« on: October 04, 2021, 06:45:14 pm »
I hear through the grape-vine that lots of social media website have gone down. I can't help but wonder why? Also I find it very amusing too. ;D

Facebook = Broken
Whatsapp = Broken
Instagram = Broken

Either its a social experiment, or hackers have finally pulled out all the stops.

45
Linear Amplifiers / RM KLV350.....NOT!
« on: October 03, 2021, 10:42:58 am »
I was very kindly donated an RM KLV200 valve linear amplifier some weeks ago from a station not far from me. Sadly they didn't work, which wasn't a major issue, as there so simple inside. The EL519 output pentode had gone pop. Valves don't usually go pop as-such. There's many stages of failure, most typically being weak emissions. However this did go out with a spectacular light show. The Anode and cathode had an internal short-circuit, which is another common fault along with open filaments. I was in company with Pete 26CT3855 at the time when we power up the amp on the bench for testing. I can honestly say it made us both jump back.

Picture below of front panel.

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You may have already noted from reading the post title and looking at the image, the amp is indeed labelled as the KLV350. Obviously RM reused the front panel from that particular version. Looking for information on the internet revels that the KLV350 was discontinued not long after released.

Picture below of rear panel.

304-1

The rear panel has the basic minimum connections for wiring the amplifier inline. Notice how the RTX and ANT labelling runs as one continuous word. I can't help to think perhaps some people wiring this up backwards.(yes it's common, I hear it on the bands a lot.)

Picture of internal view.

306-2

As you can see from the photo, these amplifiers are incredibly simple inside, theres also a sticker label on the transformer confirming the true model number of the unit. If it had been the KLV350, there would be 2x EL519's in parallel configuration.

So why did it fail, well thats probably one of 3 possible reasons.

1st being the plate output loading not being correctly set, this in-time will have a massive effect on longevity, as the valve has more-than-likely been "Red Plating" due to the massive mis-match on it's output.

2nd being the valve has been subject to many hours of standby "without use". This is another contributing aspect to premature failure, as the cathode emission surface will just evaporate, rendering the valve useless and likely to have internal shorts.

3rd and finally is the valve may had an undetected fault which was destine to fail at somepoint after a few hours or thermal cycling. Another contributing factor is excessive shock during transit from supplier to customer. This could have also happened to the valve in place as the whole unit was subject to excessive shock treatment.

Final conclusion

The amplifier now works absolutely fine, and has done ever since I replaced the EL519. I do remember noting that the original owner commented on the relay "Chattering" whilst in transmit. First of all this in not a relay fault. if you look closely at the anode PCB on the final picture, your see there is a very poor attempt as making a "Meander" or "PCB Track Inductor" for the APC or "Anti Parasitic Choke". Those who have spent many years working with valve equipment like myself for just over 30 years, will instantly recognize this problem. You can either replace the valve that has a slightly different spec on performance, or simply add a 6 turn 9mm dia APC inductor in series with a 2 watt 10 ohm carbon resister to stop this issue.


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