Hello, as I asked earlier about finding fuses, I was able to get .5a fuses they did not have .6a fuses. I checked the voltage across the 110 fuse terminals with my volt meter and got 120v. I also check the 125, 160 and the 220 fuse terminals and got a reading of only 110 volts. So I instaled the fuse in the 110 terminal and it blew right away, I also tried it in the 125 fuse terminal, it did not blow, but nothing happened. So I check all the tubes and found two bad tubes EC 92 had shorts and grid emmisions according to my B&K 707. The ECH 81 tube was very weak. I also found that the dial lamp was burnt out. So I replaced all the bad tubes with tested good ones and a new dial lamp. Still keep blowing fuses!!!! Where do I go next?

:Hello, as I asked earlier about finding fuses, I was able to get .5a fuses they did not have .6a fuses. I checked the voltage across the 110 fuse terminals with my volt meter and got 120v. I also check the 125, 160 and the 220 fuse terminals and got a reading of only 110 volts. So I instaled the fuse in the 110 terminal and it blew right away, I also tried it in the 125 fuse terminal, it did not blow, but nothing happened. So I check all the tubes and found two bad tubes EC 92 had shorts and grid emmisions according to my B&K 707. The ECH 81 tube was very weak. I also found that the dial lamp was burnt out. So I replaced all the bad tubes with tested good ones and a new dial lamp. Still keep blowing fuses!!!! Where do I go next?

Hello David

Have you checked the selenium-rectifier and the electrolytics?

To save fuses, i would recommend that you wire in series with the mains a 60 - 100 W lamp. If you have a short in the radio it will light up and protect the radio and its components.

Do you have the schematic?

Kind regards from Switzerland, Walter Haring

:Hello, as I asked earlier about finding fuses, I was able to get .5a fuses they did not have .6a fuses. I checked the voltage across the 110 fuse terminals with my volt meter and got 120v. I also check the 125, 160 and the 220 fuse terminals and got a reading of only 110 volts. So I instaled the fuse in the 110 terminal and it blew right away, I also tried it in the 125 fuse terminal, it did not blow, but nothing happened. So I check all the tubes and found two bad tubes EC 92 had shorts and grid emmisions according to my B&K 707. The ECH 81 tube was very weak. I also found that the dial lamp was burnt out. So I replaced all the bad tubes with tested good ones and a new dial lamp. Still keep blowing fuses!!!! Where do I go next?

Hi David,

It sounds like your radio has a universal power transformer. You would use a fuse in only one fuse holder according to what the mains voltage is in the area where the radio is being used. If the voltage is 120 volts then a fuse (of the proper size) would be placed in the 120 volt fuse holder with no fuses in the other holders. If the local voltage is 220 volts then a fuse (of the proper size) would be in the 220 volt fuse holder and none in the other fuse holders. Of course the filter capacitors and rectifiers in the power supply should be checked and replaced if defective.

Radiodoc

:Hello, as I asked earlier about finding fuses, I was able to get .5a fuses they did not have .6a fuses. I checked the voltage across the 110 fuse terminals with my volt meter and got 120v. I also check the 125, 160 and the 220 fuse terminals and got a reading of only 110 volts. So I instaled the fuse in the 110 terminal and it blew right away, I also tried it in the 125 fuse terminal, it did not blow, but nothing happened. So I check all the tubes and found two bad tubes EC 92 had shorts and grid emmisions according to my B&K 707. The ECH 81 tube was very weak. I also found that the dial lamp was burnt out. So I replaced all the bad tubes with tested good ones and a new dial lamp. Still keep blowing fuses!!!! Where do I go next?

Can you point us to a schematic? I can't seem to find one here.

Can you point us to a schematic? I can't seem to find one here.

I have one that I can Email you. My address is dgrizzy68@aol.com.

You can also try this page.
http://www.vintage-radio.net/forum/showthread.php?t=7058&referrerid=2611

David, look at the schematic again. One side of each fuse holder goes to one side of the AC line. The other side of each fuse holder connects to a primary lead of the transformer. As been said only one appropriate fuse is placed in only one holder which represents your mains, e. g., 125 VAC. The fuse completes the circuit along with the switch to supply voltage to the primary. You would not get voltage readings across the fuse. I don't get your 110 reading. You could put your .5 fuse in any holder and if your mains is 120 you will read only 120 from one side of the AC line to to one side of each fuseholder and to both sides of the fuseholder containing the fuse. You will not read the schematic voltages 110V, 125V, 160V, or 220V unless supplied, and only one at a time, to the primary of the transformer. The primary of the transformer has these taps to provide for different mains voltages in different countries. I don't envy you working on this set. These are even troublesome to some seasoned repairman. I think it's been mentioned about too many switches. I think your transformer is probably ok. I don't think the .1 difference matters at 125V. If it does that's calling it too close. Break a connection to the rectifier and read your secondary AC voltage. You need to replace the electrolytics.

Bill VA

:Hello, as I asked earlier about finding fuses, I was able to get .5a fuses they did not have .6a fuses. I checked the voltage across the 110 fuse terminals with my volt meter and got 120v. I also check the 125, 160 and the 220 fuse terminals and got a reading of only 110 volts. So I instaled the fuse in the 110 terminal and it blew right away, I also tried it in the 125 fuse terminal, it did not blow, but nothing happened. So I check all the tubes and found two bad tubes EC 92 had shorts and grid emmisions according to my B&K 707. The ECH 81 tube was very weak. I also found that the dial lamp was burnt out. So I replaced all the bad tubes with tested good ones and a new dial lamp. Still keep blowing fuses!!!! Where do I go next?

Bill, I hear ya about the switches. I had the original print that came with my unit (Grundig console 7042) and spent several days figuring out what was what. When I finally got it (yes I'm slow), repair was easy.
As far as the fuses, YES, there were different positions for the input voltages. If your fuse blows, there is for sure a short. Mine has the original selenium rectifier (not going there BILL....lol). I haven't seen the print for THIS model but from what I remember on my model, there is a bridge rectifier and a 50Uf filter cap off of the secondary of the power Xformer. I would look there first.

Grundig is what got me into OLD radios. Cool engineering (like a Mercedes). I own 4 and they ALL sound great for a fifties era. Kinda odd IF freq though (467Kc on AM) although the FM is standard 10.7Mhz. I get owwws and ahhhs for the old philcos and crosleys but get WOW on the grundigs. Go figure....
Joe

I don't envy you working on this set. These are even troublesome to some seasoned repairman. I think it's been mentioned about too many switches. I think your transformer is probably ok. I don't think the .1 difference matters at 125V. If it does that's calling it too close. Break a connection to the rectifier and read your secondary AC voltage. You need to replace the electrolytics.
:
:Bill VA
:
::Hello, as I asked earlier about finding fuses, I was able to get .5a fuses they did not have .6a fuses. I checked the voltage across the 110 fuse terminals with my volt meter and got 120v. I also check the 125, 160 and the 220 fuse terminals and got a reading of only 110 volts. So I instaled the fuse in the 110 terminal and it blew right away, I also tried it in the 125 fuse terminal, it did not blow, but nothing happened. So I check all the tubes and found two bad tubes EC 92 had shorts and grid emmisions according to my B&K 707. The ECH 81 tube was very weak. I also found that the dial lamp was burnt out. So I replaced all the bad tubes with tested good ones and a new dial lamp. Still keep blowing fuses!!!! Where do I go next?