[grandpaslab]

Hi Pholks!

I'm brand new to the Phorum, and brand new to radios. I have been building tube guitar and some hi-fi amps for a few years.

I'm here because a friend gave me her Philco, a 610 as I just discovered (see pic), and I'm looking to do a bit of restoration. From the photos, you'll see that it's in pretty good shape, and that someone has done a partial recap at some point. I brought it up on the variac w/ light bulb limiter, and it works! I was able to tune in several AM stations.

I've been soaking up some info here, so I have some idea what I'm in for, rebuilding bakelite blocks and such. Alignment sounds scary, but I'll burn that bridge when I come to it. The question I have at the moment is, do I have the right schematic. This is the closest I've found. It almost matches my tube complement. I've got a 41 output tube, it shows a 42. Would that be a common production variation? Or maybe whoever worked on it before changed tube types? Any clues much appreciated.

I'm excited! My first old radio! Until a few days ago I couldn't have told you what a field coil was. What? There weren't always permanent magnets??

John

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[Ron Ramirez]

Hi and welcome!

Yes, you have a 610B, and yes, the schematic you have is a 610 schematic.

The 610 underwent numerous circuit changes during production. In order to have all of these, I suggest you order the service pack for this set from Chuck - well worth the $7 cost.

http://www.philcorepairbench.com/

A 41 will substitute for a 42 in a pinch, but it's best to use the proper 42 tube. The characteristics of the two are not exactly alike, plus the 41 has lower output power.

[grandpaslab]

Thanks, Ron. I've placed my order with Chuck, and found what looks to be a good 42 for a reasonable price on eBay.