Grunow - Model 654 | Loudspeaker Repair w/ Rubbing Voice Coil

Attempting to repair the 8 inch electrodynamic loudspeaker to mitigate the rubbing voice coil and loose surround.
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The receiver playing after recapping and replacing all out of tolerance resistors in addition to using a 1.0V Mini Solar Panel Cell to replace the old defective Bias Cell for the 6Q7G tube.
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New lead dress on both I.F. Transformers and tackling a few capacitors and resistors along the way.
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In the second episode, replacing a few capacitors and resistors before discovering the I.F. Transformers lead dress issue that needs to corrected.
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In the first episode, preparing to restore this beautiful Grunow (General Household Utilities Co.), Model 654, Chassis 6N from 1937. The cabinet is very unique being a Table Upright; looks like a mini console covering two bands, i.e., the BC (550-1750) kHz and SW (2000-7000) kHz. The I.F. Frequency is 465 kHz.
The schematic: Riders 8-19, 20.
The receiver tube complement:
6K7G - RF Amplifier
6A8G - 1st Detector/Oscillator
6K7G - I.F. Amplifier
6Q7G - 2nd Detector/A.V.C. & Audio Amplifier
6F6G - Power Output
80 - Full-Wave Rectifier
The playlist for the series:
studio.kzbin.infoP...
LC (Front-End) AM Broadcast Tester - One Chip AM Radio Circuit
studio.kzbin.infoZG_E...
Thanks for watching and subscribing to my channel on vintage radio repair and other related circuits.
#restoreoldradios

[@ndrmkhn6559]

Man, this is ASMR of an adult male. Your works with speakers is a true craftsmanship. Thank you!

[@RestoreOldRadios]

Thank you for your kind words. All the best. Don

[@hestheMaster]

It needed to have this done. Thanks for showing the procedure Don.

[@RestoreOldRadios]

It sure did Steve. Thanks for watching and reaching out. Best, Don

[@matambale]

Had a feeling you might just do this. Nicely done, sir. Requires patience and a delicate touch - not two of my strong points.

[@RestoreOldRadios]

Thank you kindly! It tested my patience for sure. Best, Don

[@Radio478]

Great project thanks from England

[@RestoreOldRadios]

Thanks for watching! Best, Don

[@greggsvintageworkshop8974]

Nice work Don, it sounds GREAT!

[@RestoreOldRadios]

Thank you Gregg. It’s a great playing receiver and with the extra RF tube it makes for a good DX receiver too. Hope you had a great 4th and enjoy the upcoming weekend. Best, Don

[@Timothycan]

Thanks for sharing. I just had an issue with a rubbing speaker - I replaced it, but I still have the old one so I have nothing to lose if I give this a try!

[@RestoreOldRadios]

Hope you’re successful too. Best, Don

[@DERB_Seymour_Indiana]

Looks and sounds great Don. Nice job. :)

[@RestoreOldRadios]

Doug - many thanks! Best, Don

[@tectalabyss]

Outstanding has always my friend. Happy Forth of July to you and all your Viewers . Liked and shared. All my very best.

[@RestoreOldRadios]

Same to you! Thanks again Bobby. Best, Don

[@erikdenhouter]

No dust cover over the magnet ?

[@RestoreOldRadios]

I didn’t see any signs/evidence that a dust cover was ever placed over the center pole piece on the OEM speaker. Best, Don

[@erikdenhouter]

@@RestoreOldRadios Oh sorry... Originals 🤭

May I know your email for collaboration？☺