Have the receiver section of the 1155 up and running, still awaiting a British version of the 6R7 to get the BFO and AVC up but can use the radio for normal reception in manual gain mode. Man, that receiver has a lot of gain for just one RF stage and two IF stages. It’s incredibly easy to overload and has buckets of sensitivity. Oddly the AM reception is very sharp on the HF bands, normal for a broadcast receiver on the 0.5 to 1.5 or whatever that is on the broadcast band and real wide on the VLF.

The question for today is “what’s with the filter in the tuna can?” This is a 1155A that was rebuilt in 53 and has the small can right in front of the grid input of V3, the first RF amplifier. That appears to be a filter for something, don’t know if it was intended to keep the IF frequency from getting into the front end or if it had some other use? Somehow recall something about a broadcast station being around the IF frequency of the receiver and they had to add additional filtering because of that?  Having an IF frequency of 560 kHz can be a disadvantage.

Put a video of the radio on the tube at:

https://www.youtube.com/watch?v=0uWhwn9b3lk

You can see the tuna tin right next to the first RF with a white and green wire running to it. The white wire goes to the grid of the first RF amplifier. Going to keep the can in the radio but was curious as to its function, being its only on the last radios produced.

Ray F/KA3EKH