I've just finished recapping this Radiogram I changed out all the resistors that were out of spec and replaced a BC108 germanium I mounted the chassis back in and turned it on with a dim bulb light to be on the safe side it turned on OK but the volume pot wasn't working? I had the radio on and because the volume pot wasn't working I couldn't turn it down. I had deoxited it before hand because it was scratchy as hell,the strange thing is that when I turn the knob the sound goes from the left speakers across to the right speakers. When I tried the balance pot its OK on the right side and no sound on the left side? I cant work out why its doing this ,I replaced everything the way it was unless someone has been at it before me? Has anyone got a schematic for this model or know where I can get one,I need to check the wiring on this old girl.

Not familiar with that product? Has it got a printed circuit, one misplaced blob of solder ...........?

Always take a photo of how it was, before you played with it. Irrespective of a Monkey being in there before & hacked it.

Marc

I've sent the manufacturers service manual to be uploaded here.

Just a small point - BC108 transistors are silicon.

Astor G17AD User Manual.

BC108 transistors are silicon.

Now that brings back memories. Used lots of BC108/BC109 transistors in the 1970s. In fact I probably have some in a parts drawer somewhere deep in the impenetrable mess of my garage, never to be found again until I shift to my new workshop.

Yes, I cut my teeth on BC108's studying electronics at trade school even though they were already obsolete and had been superseded by BC548's. Our text books and study notes still referred them as BC108, etc.

Rosco, I believe this Astor G17AD will be riddled with Ducon Red Caps. These look like a ceramic disc capacitor with a red mark on the top. Ducon Red Caps are incredibly unreliable and are the cause of most faults in 1960's Australian made solid-state equipment. Red caps can be replaced with polyester or monolithic types.

Tried to resend the service manual (5meg) at 0800 hrs but it bounced again.

I may have found the problem,I soldered a rectifier back onto the wrong tag? I went back over all the photos I took before I started to see if Id done anything stupid and sure enough I had! I cant work out how it could effect the volume though? Thanks for the heads up on the red top caps otherwise I would never have known. I have a gmail account that you can send big files on.

I just had a similar problem which turned out to be a dry joint on the positive side of a B+ filter cap. It seems many radio circuits can provide a very reduced audio output with a major component completely out of circuit. This wouldn't happen in the digital world, where it is all or nothing.

Maven

Yay,I received the service manual,thank-you Martin I appreciate it. I'm going to feel a lot more confident about this now. Somehow I don't think the rectifier being in the wrong position is going to effect the volume though.(I hope it did) Ha! I have the chassis at my place and the radiogram a few miles away so its not very convenient to test it.

And the value of photo's, when there are senior moments.........................

Ive been trying to email the Astor G17AD manual but the Vintage Audio domain server wont accept it? There's no problem sending the file. I think the server may have to be reconfigured to accept a file of that size?

The size of the file won't matter (or at least it shouldn't). Someone else has had the same problem in the last few days though when I checked the settings all seemed in order.

I'll do some more tests this morning.

What size is the file?

Okay, it does look like the server has a niggle.

I will upgrade the mail server software tonight and see if that sorts things out.

I have a backup address if you want the attachment uploaded ASAP - vintageradiohotmail.com.au

I am not sure what the size limits are at Microsoft these days but its worth a try until I get the problem here sorted.

The file is 5.2M, Hotmail wont do it because its too big,Gmail will. Ive sent and received big files with Gmail before no problem.The delivery failure message says Rejected by the server for the recipient domain of vintage-radio.com.au.

Yes, same problem reported by the other member. Hopefully the upgrade tonight will sort it out. I sent myself two files, one from inside the network and the other from outside, the 'inside' e-mail had an attachment weighing 61MB and went through with no worries. The 'outside' one came from an old Bigpond webmail account I have and it weighed about 9MB and got rejected with the same message.

E-mail can be a pain sometimes. The hard disc on the mail server is 2TB so that is theoretically the size of my account, assuming that the settings would work as they should.

I've recently moved this whole operation to a different location - something just had to go wrong, ay...

I've just sent a smaller file to both email addresses to be uploaded to a different thread.