Cannot Adjust an IF Transformer’s cores
Posts: 89
Threads: 21
Joined: Jul 2022
City: Monticello
State, Province, Country: Illinois
Great work, we are all looking forward to the final design.
Philco's
86 Low Boy 71B 42-321T
90 High Boy 52B 46-1203
95 High Boy 118B 48-214
112X Console 60B 48-206
118X Console 84B 49-506
41-608P Console 610B
41-265 Console 37-89B
52GC 38-35B
20 Baby Grand 38-10T
70 Baby Grand 41-221CI
Posts: 787
Threads: 48
Joined: Feb 2013
City: Shenandoah,
State, Province, Country: Pennsylvania
Hi Joseph, here is a great article on various types of FM detectors including the FM1000…https://www.radiomuseum.org/forumdata/users/4942/file/FM%20Alignment%20Ghirardi%201952%20OCR.pdf
Ron
Bendix 0626. RCA 8BX5. RCA T64
Philco 41-250. Philco49-500
GE 201. Philco 39-25
Motorola 61X13. Philco 46-42 Crosley 52TQ
Philco 37-116. Philco 70
AK 35 Philco 46-350
Philco 620B. Zenith Transoceanic B-600
Philco 60B. Majestic 50
Philco 52-944. AK 84
Posts: 54
Threads: 5
Joined: Jan 2024
City: Tulsa
State, Province, Country: Oklahoma
Thank you for sharing! I am going to take some time to review and soak this all in.
Joseph
Philco 46-480
Philco 49-906
Posts: 54
Threads: 5
Joined: Jan 2024
City: Tulsa
State, Province, Country: Oklahoma
Just a quick update, folks. The PCBs have been manufactured, and shipped yesterday. Surely they’ll arrive this week. I also just submitted an order for the connectors I will need between the two PCBs. We should have a working IF transformer by the end of the week.
Joseph
Philco 46-480
Philco 49-906
Posts: 89
Threads: 21
Joined: Jul 2022
City: Monticello
State, Province, Country: Illinois
Awesome!!
Philco's
86 Low Boy 71B 42-321T
90 High Boy 52B 46-1203
95 High Boy 118B 48-214
112X Console 60B 48-206
118X Console 84B 49-506
41-608P Console 610B
41-265 Console 37-89B
52GC 38-35B
20 Baby Grand 38-10T
70 Baby Grand 41-221CI
Posts: 54
Threads: 5
Joined: Jan 2024
City: Tulsa
State, Province, Country: Oklahoma
Posts: 911
Threads: 37
Joined: Feb 2015
City: Roseville, MN
Joseph, now you are an engineer!!
Posts: 54
Threads: 5
Joined: Jan 2024
City: Tulsa
State, Province, Country: Oklahoma
Thank you! I was quite new to the Phorum when I started this post, so I feel like it might be advantageous to publish a summary of the process we went through in the Electrical Restoration category. I realize now that this thread should have been there, but that’s okay.
Joseph
Philco 46-480
Philco 49-906
Posts: 1,925
Threads: 145
Joined: Jan 2013
City: Westland, MI
The abilities of our 'Phorum Pholks" never ceases to amaze me! Fantastic fabrication, Joseph! I'm waiting now for your PCB solution to the FM1000 tube scarcity. Come up with that and you would make A LOT of hobbyists happy! Take care and BE HEALTHY! Gary
"Don't pity the dead, pity the living, above all, those living without love."
Professor Albus Dumbledore
Gary - Westland Michigan
Posts: 89
Threads: 21
Joined: Jul 2022
City: Monticello
State, Province, Country: Illinois
Outstanding work indeed. I wish I could come up with solutions like this.
Philco's
86 Low Boy 71B 42-321T
90 High Boy 52B 46-1203
95 High Boy 118B 48-214
112X Console 60B 48-206
118X Console 84B 49-506
41-608P Console 610B
41-265 Console 37-89B
52GC 38-35B
20 Baby Grand 38-10T
70 Baby Grand 41-221CI
Posts: 787
Threads: 48
Joined: Feb 2013
City: Shenandoah,
State, Province, Country: Pennsylvania
Joseph, this is beyond awesome. A lot of thought and engineering went into this and you hit a home run! Now I must save this thread for future reference. Thanks for posting!
Ron
Bendix 0626. RCA 8BX5. RCA T64
Philco 41-250. Philco49-500
GE 201. Philco 39-25
Motorola 61X13. Philco 46-42 Crosley 52TQ
Philco 37-116. Philco 70
AK 35 Philco 46-350
Philco 620B. Zenith Transoceanic B-600
Philco 60B. Majestic 50
Philco 52-944. AK 84
Posts: 54
Threads: 5
Joined: Jan 2024
City: Tulsa
State, Province, Country: Oklahoma
Thank you all! It would not have been possible without the guidance of everyone who has weighed in. So far I’ve gotten about 8 hours of playtime out of the radio with the new IF transformer. It’s working great, but I’ve had to wiggle the IF can a few times because audio has gone quiet. Wiggling the can does the trick. I’m suspecting I have a bad solder joint, so I will have to pop it back open to address that.
Joseph
Philco 46-480
Philco 49-906
Posts: 54
Threads: 5
Joined: Jan 2024
City: Tulsa
State, Province, Country: Oklahoma
I’ve taken the day off today, so I took a look at the IF transformer. I got lucky this time—there were no loose solder connections. The unit simply wasn’t fastened securely into the brass clip that holds it in place. This has resolved the audio issue.
Joseph
Philco 46-480
Philco 49-906
Posts: 89
Threads: 21
Joined: Jul 2022
City: Monticello
State, Province, Country: Illinois
Congrats on the easy fix. I will bookmark this great project for future use as I’m sure many others will as well.
Philco's
86 Low Boy 71B 42-321T
90 High Boy 52B 46-1203
95 High Boy 118B 48-214
112X Console 60B 48-206
118X Console 84B 49-506
41-608P Console 610B
41-265 Console 37-89B
52GC 38-35B
20 Baby Grand 38-10T
70 Baby Grand 41-221CI
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