Grunow - Model 654 | Replacing a Few Capacitors & Resistors | I.F. Transformer Lead Dress Issue

[@jimnewman5596]

I bought that rivet tool a while back after watching one of your videos and it quite handy indeed Don.

[@RestoreOldRadios]

Thank you Jim. Hope this finds you doing well. Best, Don

[@josephmagedanz4070]

Thanks for the "BED" resistor chart...that'll be helpful.

[@RestoreOldRadios]

You bet! I’m glad you found it helpful. Best, Don

[@DERB_Seymour_Indiana]

Hey Don. Quite a few caps in this set to replace. Neat tool to remove rivets. Off to the races! :)

[@RestoreOldRadios]

Lots of caps Doug as you noted. So far, all of the leads are wrapped around the tie points multiple times. Looks like the coil method will be used often. Best, Don

[@f.k.burnham8491]

I always have a good assortment of colored heat shrink tubing. When I have crumbling rubber wiring in a chassis, I can with care, just slide the correct color heat shrink down over the wire or up into an IF can which negates the need to replace the wire. All I do is unsolder one end. Also no need to shrink the tubing unless you want to.

[@RestoreOldRadios]

Great point! I’ve done that in the past too with positive results. Hopefully folks following the comments will see this as an option. I decided to rewire them and cleanup the trimmers too. I appreciate you watching and your recommendation. All the best. Don

[@chetpomeroy1399]

Using an engraver is a pretty smart idea for roughing up the surface for a better solder connection! It would be a good precaution to either put some spaghetti tubing over those bare wires going into that IF transformer or just replace them. I've got an RCA 75X14 from 1947 that uses those same types of crumbling rubber insulated wires.

[@RestoreOldRadios]

Chet, the little engraver does come in handy. The I.F Transformers are coming out and I’ll be placing new lead wires on them for sure. Thanks again for following along. Best, Don

[@saturn5tony]

Thank you for the cool resistor chart Don. I will say its nice to know the third digits (e)iphers will be fun to find! Hehehe. Also that rivet removal tool looks fantastic! Who makes that? Ty buddy 😊

[@RestoreOldRadios]

You’re welcome Tony. A link to: springtools.com/collections/all-tools Hope this helps. Best, Don

[@saturn5tony]

@RestoreOldRadios ohh this one is on my list to purchase now! I have always handled issues with removing rivets! Thank you Don! So much.

[@hestheMaster]

I have heard that dog bone resistors are usually good but down south the temperature and humidity changes over time make them unreliable. Don't ignore the little 1/4 and 1/2 Watt resistors either, for the same reason. Terminal strip solder points are too shiny smooth and don't accept solder too well. Good idea with using an engraver but emery cloth works too. I bought some at Menard's. Probably will last forever as I don't do plumbing work. Oh no the cursed rotten rubber insulation has raised it's ugly head once again. Been there , done that and seems like way too much of the time Don.

[@charlymgtow294]

Hy from Germany, must i also replace a Mika capacitor? I mean those flat plastic capacitors with dots. Are they very durable or do they always have to be replaced? Thank you

[@hestheMaster]

@@charlymgtow294 They are a very low capacitance and usually don't cause problems. Mica caps pretty much are stable even as old as they are.

[@RestoreOldRadios]

Great information Steve. Only one resistor to this point was found to be in tolerance. Even the 1/4, 1/2 W resistors have degraded significantly over time. Good tip on the emery cloth. Best, Don