01-24-2019, 02:02 PM
Some final thoughts on the 116B receiver.
From the service standpoint it's fairly straightforward but there is a number of stages to service. Taken one by one one at a time makes things easy. Not quick but easy. Chassis is for the most part pretty roomy, access is good and no rf sub chassis to deal with. Had to take a little extra time when servicing the dial drive (lost one of the ball bearings) and mechanically aligning the dial arrows and shadow meter.
Alignment when well and the BCB is within 1/2 a hash mark (5kc) throughout. I wasn't particularly concerned w/the sw bands in terms of osc alignment but would say it's within abt 20kc which isn't too bad for 1935 technology. Sensitivity and selectivity are very good for AM reception. Wide enough for good frequency response but sharp enough to limit adjacent channel interference. I notice a lot less fading of distant signals w/this set compared many others w/less tubes.
I think the audio output stage develops too much power for the 8"spkr. My H-17 spkr had a worn spider that was causing that buzz. After the spkr was coned the 2nd time it's still has that buzz granted it's less and it's only at high volume levels. I'm thinking that the original spider added some dampening factor when new to the cone thus lessening the bass response. With the new cone/spider setup that isn't the case. It plays fine as long as it's not turned up to deafening levels. The 8" spkr is working hard to deliver all the sound at high levels. Seems like it's going to jump out of the cabinet.
Very pleasant set to listen to and with good dial accurate you set the dial on frequency and the proper station is there. Power transformer does get warm but is quite reasonable and has no 60cy noticeable hum. Have been using a 30" square loop ant and pickup stations from all over. Canada, Ill., Tenn., Ga., and Mo. to name a few. A lot of times I'm up late at night listening for new otr stations. It's kinda unique in as it's the very last of the 16 series tabletop sets and they don't turn up often.
From the service standpoint it's fairly straightforward but there is a number of stages to service. Taken one by one one at a time makes things easy. Not quick but easy. Chassis is for the most part pretty roomy, access is good and no rf sub chassis to deal with. Had to take a little extra time when servicing the dial drive (lost one of the ball bearings) and mechanically aligning the dial arrows and shadow meter.
Alignment when well and the BCB is within 1/2 a hash mark (5kc) throughout. I wasn't particularly concerned w/the sw bands in terms of osc alignment but would say it's within abt 20kc which isn't too bad for 1935 technology. Sensitivity and selectivity are very good for AM reception. Wide enough for good frequency response but sharp enough to limit adjacent channel interference. I notice a lot less fading of distant signals w/this set compared many others w/less tubes.
I think the audio output stage develops too much power for the 8"spkr. My H-17 spkr had a worn spider that was causing that buzz. After the spkr was coned the 2nd time it's still has that buzz granted it's less and it's only at high volume levels. I'm thinking that the original spider added some dampening factor when new to the cone thus lessening the bass response. With the new cone/spider setup that isn't the case. It plays fine as long as it's not turned up to deafening levels. The 8" spkr is working hard to deliver all the sound at high levels. Seems like it's going to jump out of the cabinet.
Very pleasant set to listen to and with good dial accurate you set the dial on frequency and the proper station is there. Power transformer does get warm but is quite reasonable and has no 60cy noticeable hum. Have been using a 30" square loop ant and pickup stations from all over. Canada, Ill., Tenn., Ga., and Mo. to name a few. A lot of times I'm up late at night listening for new otr stations. It's kinda unique in as it's the very last of the 16 series tabletop sets and they don't turn up often.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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