08-11-2024, 10:26 PM
Great work, we are all looking forward to the final design.
Cannot Adjust an IF Transformer’s cores
08-11-2024, 10:26 PM
Great work, we are all looking forward to the final design.
08-12-2024, 06:42 AM
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
08-12-2024, 07:32 AM
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
08-20-2024, 07:25 AM
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
08-20-2024, 07:44 AM
Awesome!!
08-24-2024, 04:32 PM
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original insides, and soldered the new assembly to it. Then I put the metal can on top. I need to complete the full alignment (at long last), but I was able to tune into a few stations quite clearly. And the nice part is that it looks original!
Joseph Philco 46-480 Philco 49-906
08-24-2024, 06:37 PM
Joseph, now you are an engineer!!
08-24-2024, 08:07 PM
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
08-24-2024, 08:27 PM
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
08-24-2024, 11:16 PM
Outstanding work indeed. I wish I could come up with solutions like this.
08-25-2024, 07:27 AM
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
2 hours ago
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
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