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 Grundig 2035 - 56 battery operated.
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 Return to top of page · Post #: 1 · Written at 7:30:13 PM on 12 November 2018.
Muzzery's Gravatar
 Location: Maleny, QLD
 Member since 28 February 2018
 Member #: 2218
 Postcount: 95

Hello all!
I have been given a radio, a Grundig. It is by all appearances, a 2035-56. However, the rm.org page states this as AC only. This set seems to be DC only.
Are there any Grundig "buffs" on here who could offer a correct model designation? The radio has no back cover, which I assume would have had the model number written upon it.
thanks, Murray


 
 Return to top of page · Post #: 2 · Written at 10:58:29 PM on 12 November 2018.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6012

DC only sounds odd, other than for battery sets.

What makes you say DC only?


 
 Return to top of page · Post #: 3 · Written at 4:42:54 AM on 13 November 2018.
Muzzery's Gravatar
 Location: Maleny, QLD
 Member since 28 February 2018
 Member #: 2218
 Postcount: 95

Sorry that’s what I was trying to say, GTC. It has battery plugs for a and b battery, no mains lead and no transformer. I haven’t had a chance to really look through it yet, and I’d like to find the schematic so I can know what I’m looking at. I found who gave it to me ( it was left on my doorstep one morning unannounced) a retired electronics guy, he said he believed it was running when given to him in the 80s, and has been stored ever since. So that tells me if it hasn’t been torn up, it’s a battery set. At this stage I’m just googling “grundig (model no) and adding 1, repeatedly, to see what comes up. So far the 2035-56 is the closest in appearance, but the glass dial layout is different.
It also appears to be am only, whilst the 2035-56 should have fm.

This should be a very nice set once sorted. I might have to look into one of those battery eliminator devices.


 
 Return to top of page · Post #: 4 · Written at 10:56:21 AM on 13 November 2018.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6012

Along with Philips/Mullard, it can sometimes be hard to determine a Grundig model from photos as many of them look similar.


 
 Return to top of page · Post #: 5 · Written at 3:15:01 PM on 16 November 2018.
Simplex's Gravatar
 Location: Bathurst, NSW
 Member since 7 August 2008
 Member #: 336
 Postcount: 336

I am proud owner of a Grundig 6001 Satellite which my Dad bought over from Germany in the 1960's. The most excellent shortwave portable radio I have seen and still beautiful audio on FM even though mono.

The 2035-56 would have been a very expensive radio in its day for someone in Australia, rather rare, and once given a bit of work would be a 1st class performer even now.

Interesting it is a battery model, guess it would have 1.5 volt minature valves. I have never seen or heard of a Grundig battery valve radio although of course, such would have been made for users in non mains power areas.

A rare one for sure.

Good luck with your restoration. Am sure it will still pull in those far off stations.


 
 Return to top of page · Post #: 6 · Written at 7:51:17 PM on 16 November 2018.
Muzzery's Gravatar
 Location: Maleny, QLD
 Member since 28 February 2018
 Member #: 2218
 Postcount: 95

Yes, Simplex, I think it will be quite a beautiful set. I have spent the week digging through the depths of google to try confirm model number. I thought I had got it, with the model 2037wze/3d. this model looks the part physically. However, the valve lineup was wrong according to rm.org.

This has a line up as follows. (not sure of correct order)

DF96 (with 944 on top)
DF96 (with 947 on top)
DK92
DAF91
DAF96
two times DL94
and a DM71. this is a magic eye kind of indicator lamp.

Interesting though, is the notes on the 2037, "Exportmodell. 500 kHz bis 26,5 MHz in 5 Bereichen. Optionale Batteriespeisung durch externe Zerhackereinheit."

I think this is export model, 500kHz to 26.5MHz in 5 areas. optional battery feed? or input, by external chopper unit.
Could this mean some sort of battery eliminator? a chopper unit?
Incidentally, this will look nice with my grundig 5010, also a grand looking unit.


 
 Return to top of page · Post #: 7 · Written at 9:09:45 PM on 16 November 2018.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6012

Google translate's version is: "Export model 500 kHz to 26.5 MHz in 5 ranges Optional battery powered by external chopper unit."


 
 Return to top of page · Post #: 8 · Written at 10:38:40 PM on 16 November 2018.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1379

I think those valves all have common 1xx equivalent names. The DM71 shows a blue exclamation mark shape, with it changing length depending on the signal strength.


 
 Return to top of page · Post #: 9 · Written at 6:01:21 AM on 17 November 2018.
Simplex's Gravatar
 Location: Bathurst, NSW
 Member since 7 August 2008
 Member #: 336
 Postcount: 336

Must admit I never knew magic eye valves were made for battery powered sets. They would be rather uncommon I guess even in their day.

Eight valves in total so will be a bit fierce on the 1.5V A battery.

The "chopper" would be a mains power supply.

(My 6001 had a power supply for mains operation however being intended for Euro 220V it blew up many years ago so ran the radio of batteries from then on.)

Your Grundig a very rare radio for Australia and good to read it has been saved and will be put in running order again.

Would love to have one as am an admirer of Grunding radios but think finding one now is surely unlikely.


 
 Return to top of page · Post #: 10 · Written at 6:26:53 AM on 17 November 2018.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1379

I have 2 Philips mains-powered sets that use the DM71. It's a bit of a gimmick though, as the DM71 display is barely visible at the best of times. You're better off ignoring it.


 
 Return to top of page · Post #: 11 · Written at 3:46:22 AM on 21 November 2018.
Muzzery's Gravatar
 Location: Maleny, QLD
 Member since 28 February 2018
 Member #: 2218
 Postcount: 95

I looked through rm.org valve data, and found all the radios which used one of the valves in this lineup. It’s a search feature on there, which is quite handy. Then I searched through all the results to find a similar match to my radio’s valve compliment.

https://www.radiomuseum.org/r/grundig_2037be3d2037_be3.html

There’s no picture, but I will have a look at this schematic to see if it’s the goods.

Grundig 2035


 
 Return to top of page · Post #: 12 · Written at 3:17:23 AM on 25 November 2018.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6349

Photo uploaded to Post 11.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 13 · Written at 8:37:37 AM on 27 November 2018.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1379

In case you find a faulty valve, here's the equivalent and pin-compatible alternatives

DF96 same as 1AJ4, same pins as 1T4, 1U4

DK92 same as 1AC6, same pins as 1AB6, DK96, X18

DAF91 same as 1S5

DAF96 same as 1AH5, same pins as 1S5

DL94 same as 3V4

DM71 same as 1N3, same pins as DM70, 1M3

Before you condemn one of these valves, make sure the heater pins are perfectly clean and corrosion-free. Even a little bit of gunk will render the valve inoperative.


 
 Return to top of page · Post #: 14 · Written at 2:22:51 PM on 6 December 2018.
Muzzery's Gravatar
 Location: Maleny, QLD
 Member since 28 February 2018
 Member #: 2218
 Postcount: 95

Thanks robbbert. And Brad also👍😁


 
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