Hi all I've been thinking about this for quite a while. But I think after 18 years on Tekscopes it is finally time to sign off. In part it is because I think I have said all there is that I can possib

Another great piece of work, Dennis! Thanks for uploading that. Craig Sent: 05 November 2019 22:48 To: TekScopes@groups.io Subject: [TekScopes] New file uploaded to TekScopes@groups.io Hello, This ema

Agreed - that was my experience with the RA17. Of course I have a 130 LC meter (no surprise there!) and the only thing I had to do was replace the smoothing electrolytic, which had gone down with the

Chuck OK - you got me fair and square. I *hope* I changed the topic line ;-) I really have no problem at all with a conversation going off in another direction, but if we do so, we really ought to str

I suspect it was the case that HP had the edge on spectrum analyzers, because (IIRC) they introduced YIG technology significantly before TEK. The older Tek spectrum analyzers like the letter plugins,

Here's the thing Chuck - if the topic was called something like "2465B and 7000 series - a comparison" or something similar that would have been more informative of the thread topic. I have a lot of i

Don't agree. When I open a post that is "7000 still hard to beat" I expect to find posts on the topic of the 7000 series scopes and plug ins. Not the 2465B. There is nothing more frustrating than keep

Mica caps are a known weak point in the Racal RA17 receiver. They are not a replace-on-sight because there are lots of them, but worth bearing in mind that they can occasionally be problematic. Craig

I thought this topic was about the 7000 series! Please change the subject line if you want to digress. The 2465 is NOT a 7000 series anything Craig

Under no circumstances use lead free solder on ceramic strips! That is a guarantee of disaster. First the melting point is too high, and second it makes a strange grainy intermetallic with the lead ba

More information on the process. The RacalRA17group status is " Your group is awaiting import into Groups.io". So io have grabbed it. The long queue is to do with transfer to io. Craig

I'm trying to transfer RacalRA17group to io at the moment. I entered the queue of 667 groups awaiting transfer two days ago. That is decreasing at 24 groups per day (so one an hour). So it is going to

There was also a termination circuit board (392-0235-00), 1/4" wide, on top of the HT primary secured by double sided tape - the #40 primary wire terminates there, as do the lead out wires. So yet ano

The winding sheet calls for four layer bank winding of the HT #40. The primary is specced as 2 x #28 bifilar. Spec is I think on Tekwiki. Craig

Yes Albert - you are absolutely right! Craig

I ran the tape slightly up the cheeks of the pot core former that I used to prevent fall in. Craig

3M 1350 tape, 1 mil film (2.5um) with a total thickness of 2.5 mil (6.3um) including adhesive. Polyester with acrylic adhesive. Voltage rating 5,500V. I used two turns between layers. Craig

I wound on to a modified pot core bobbin, which had lots of pins. So I just terminated the windings on the pins, and soldered on the original wires from the board. Being very careful about the solder

I did exactly that (wind and retrace) with the 576 transformer rewind. That has a whole lot more turns - 1400 of 40 gauge - and I levelled each layer with yellow transformer tape, which is nice and th

I'm replying to myself. The 25kHz feed to the HT transformer originates in a winding on the power converter transformer in the switched mode "high-efficiency" supply. That same winding provides severa