Demo of a Siemens E-310 Marine Receiver after Refurbishing
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- Опубліковано 8 лют 2025
- This video provides a brief demo of a Siemens E-310 'rainbow' marine communications receiver , c.1960. Refurbishing work included recapping, replacing over 40 resistors, replacing selenium rectifiers with silicon parts, replacing three tubes (the EM34 eye tube has yet to be replaced), cleaning switches and controls, removing the front panel and knobs for cleaning, repairing the slow motion drive engaging mechanism, cleaning, adjusting and re-lubing the dial drive mechanisms, troubleshooting inoperative bands (2 and 4) and a full IF and RF alignment.
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I like and have a number of different SDR receivers today, but there is still something about a well built receiver like that one just says "now that's a Radio ! " Very nice receiver.
Hi Dennis. Oh, so true, 'HDR' (hardware defined radio) is REAL radio!
Yeah!! That's a RADIO!👌...
// Happy NY 2025! And respect frm Tallinn 😊
@@nickbalashov1780 Hi Nick. Yes, its certainly a radio! Good performer too - the owner is very pleased with it and has been using it extensively for ham SSB reception
Work of art. Thanks for the show.
No problem jack - glad you enjoyed it!
Beautiful job on that set. I'm sure it wasn't easy set to work on , but you managed to do it !
Hi Joe. Yes, this is a challenging project. I plan on doing some performance checks on the set this week during soak testing. I will also be taking another look at the Bands 1 and 2 switch release mechanism that occasionally jams and results in extreme deafness on bands 3 through 12. If the switch issue cannot be fixed, eg. if it is due to excessive wear, the owner will simply not use Bands 1 and 2 (both VLF) as he has no interest in those frequencies anyway.
Seems to have been exposed to a lot of humidity by the corrosion and oxydation inside. Is the tuning tube working?
Well, I guess it was a 'marine receiver' - this one was likely found in 'Davy Jones Locker'... I (or the owner) needs to find an EM34 for it (or I convert it to a more common eye tube type - I have several in 6E5, 6G5 and 1629 in stock)
I love that dial, it is so beautiful.
Yes - its certainly stands out on a shelf of other comms sets!
very kewl!! that set looks a lot like the Marconi CSR-5 series receivers.
Hi Rob. Yes, on steroids! The electronics in this set are far more sophisticated though, and performance much better than a CSR-5
@@RadioRestoration I have a CSR-5 that came with it's original multivibrator power supply for 12VDC operation, also 2 RCA AR88LF sets, an RCA CR-91A and a Hammarlund SP-600. I love surfing the bands late at night! Keep em glowing! = )
@@robmoffatt4997 Haha, yes, indeed. I have owned and/or refurbished all of those receiver models (some several). I may have an SP-600 heading my way for refurbishing soon, as well as a National NC-100X and a TMC GPR-90. If interested, you can read my articles on the SPARC radio museum website, here: sparcradio.ca/radio-matters/restoration-projects/, and on the Eddystone User Group website here: eddystoneusergroup.org.uk/restoration-projects/ . Also, I post detailed progress reports and annotated photos on my 'Radio Restoration' Facebook page
Really cool looking set. Thanks for the video.
Glad you liked it - a very unusual design!
Wow love that dial display 😊😊
Yes - it cheers up a dull day!
Yeah.. Dial screen - my love too!😊...
Agreed - cheers-up a dull day, and is very practical too, with no cramping of the scale on the higher bands (and having the range split into 12 bands helps too)
Hi you dont need to remove everything to get at the contacts, just the shields and then for each contact the LC assembly can be pried off to reveal the contacts. Well done anyway
Now you tell me(!) - but I don't believe its as straightforward as you imply. I do not have access to this receiver anymore, but have taken a look at some of the photos I took during the work and a significant amount of disassembly work would be needed to remove the top of the switches with the LC circuits on them as there are lots of interconnecting wires and the buss bars to remove. Maybe doing this for the Band 2 local oscillator issue alone would have been feasible, but to do this for all 36 LC assemblies without any damage to the fragile coils or errors during reassembly would be a significant undertaking. Like almost all German radios of this era, the switches were not designed to be easily serviced.
That set isn’t just for maritime reception it looks like. It looks more like a communications receiver that goes up to 10 meters from the medium wave bands. Cool though.
Although it is an 'all wave' receiver, my understanding is that the E-310 was designed primarily for the marine market, replacing Models E-61, E-66a (LF, HF, c.1948), E-303, E-305 and E-306 (all HF, c.1952-1954 according to information on the ‘boatanchors.de’ website). The E-310 was reportedly licensed as a 'Class One' receiver by Deutsche Bundespost as a standard (marine) receiver like its competitor, the Hagenuk UE-12 on German ships. If you want to see an E-310 in the application it was designed for, check out this video: ua-cam.com/video/GdTcAuLXnDQ/v-deo.html - an E-310 is in use in a German fishing trawler’s radio room in the North Atlantic starting at around 4:30 minutes in, again at 5 minutes in, two are present at 6 minutes in, and with a close-up of the front panel at 6:44 minutes in.
Beck when Siemens was a German quality.
In some respects, yes - but the resistors and some of the capacitors were of dubious quality, and the construction quality leaves a little to be desired when compared to top of the line commercial communications receivers of that era, eg. not in the same league as Rhode and Schwartz, or even some North American sets, eg. Collins. That said, I doubt Siemens intended for the set to be still in use 65 years later(!) - even so, domestic grade German manufactured sets of that era, eg. Grundig and SABA used better quality resistors that have stood the test of time and most are still within tolerance in my experience
OMG!
Haha - yes, quite a stunning looking radio!
My Lord the audio commentary is terrible. Don't you listen and watch the videos you publish?
Haha - and a Merry Christmas to you too! With any luck, Santa has brought me a microphone... must check.
Microphone ordered!! - hopefully you can hear me on future videos(!)
You sound fine. I work in audio production. I’m fussy. No complaints here. Fine for the application :-)
Lovely radio. Shame there’s no 500KHz CW traffic anymore….save the KPH broadcasts.
@@MidlifeRenaissanceMan Thanks. I did buy an external mic for my iPhone after this video - has generally improved the audio quality, but then I had a comment that the noise from the receiver was masking what I was saying. I agree - very little in LF/VLF these days.