I would first replace electrolytic caps. Use similar or slightly higher values. I would use 450 volt rated electrolytics. Other caps may be leaky but electrolytics are most important.
The last push button should enable the tuner. Use tuner cleaner to free up this button. You can also use WD40 but don't over do it.
Norm
:I recently(today)worked on my parents radio,philco40-185, and have a few questions. I had pulled the tubes in this unit a few years ago and it never worked after that. I pulled all the tubes again today and cleaned all sockets and pins and now it is working again. I noticed that it has push button selector swithes and I can only get stations that are assigned to these buttons. How do you select the tuning dial,that is to tune manually with the knob? It looks like it has 7 presets and 8 buttons. Is that 8th button to select dial tuning? If so mine seems stuck, it would not push in. I did'nt try to force it because all the others work fine. Also it had quite a bit of hum in the audio output. I'm assuming that I would start with replacement of the electrolytics in the power supply.
:I have many more questions but I'll let someone respond first. Wonderful site!!!
Thanks for the quick response. I'll try the wd40. A friend brought over an Aeroline the other day and now I have radio fever. I've been to 5 antique shops since looking for radios. Don't really know what I'm looking for but I sure do like the cathedrals.
If you want some radios to drool over, go to www.radiophile.com. Another radio that is like those that I just bought in mint condition is the Montgomery Wards Airline 62-306. A site that will get you drooling over vintage televisions is www.myvintagetv.com. Check out the restoration of the TRK-12! That's as bad as some of my radios were. I by no means have the money to send them to other people for cabinet restoration, however.
Also, you do know that you can re-adjust the push-buttons on your radio for different stations, right?
Thomas
Thanks for the valuable info on what direction to take. I was able to tweak from the back of the Philco on the presets. I saw something later that made me think your supposed to tweak on both the screws, one bove the other, but not sure. It did help though.
My biggest problem is not knowing what a radio is worth. Let me tell you about the ones I have come across lately.
Silvertone 101 801 very good cosmetics all there $65
RCA T6-1 Good condition needs a knob. Cathedral $165
RCA T6-9 Bad condition, split ply, veneer strips gone,
complete electric chassis $15
NU G613 portable Good condition $35
Firestone Roamer Very good condition $45
Motorola 600 portable vey good condition $50
My background, I have an electronics degree and have repaired many high end and vintage tube audio equipment. Not much experience repairing wood. I do build and repair RC balsa airplanes though.
Russ
As for the push button adjustments on your radio, the coils control the oscillator frequency, which is what is matched with the incoming frequency to produce 455 KC, or whatever the IF is in your radio. Adjust each coil slug to find a station (first tune in the station manually so you know what is playing so you can find it later). Adjust the oscillator coils carefully so that the station is well tuned in.
The trimmer condensers (usually a screw that goes into a porcelain device that has some plates stacked in between slices of mica) are what adjust the antenna circuit. Once you have found a station for a particular push button by using the oscillator adjustment, adjust the trimmer for maximum output and fine tuning. The trimmer peaks the antenna circuit so that the station you want to hear is the station that the antenna circuit reacts to most. Because of the way a trimmer condenser is constructed, it cannot easily tune over the entire broadcast band. Because of this, different push buttons have different size (electrically) trimmers for covering different parts of the broadcast band. You will find in your schematic, found in the resources section of this web site, the portions of the band which each push button is designated to. These are the portions of the band that the antenna trimmers are capable of tuning to, which will give you maximum efficiency for each push button.
When adjusting the push buttons, adjust one at a time using the above procedure. Check each push button against manual tuning to assure that you have it adjusted to the proper station before going on to the next push button. Call letter tabs are available from www.tubesandmore.com, but these do not always match those which originally came with your radio. Unless your radio requires translucent call letters so that light can project through them from behind, you can use your computer to make call letter tabs. Select a text style and size that is similar to the original style. Type them vertically or horizontally, as is required. Choose any color paper you wish (or white or tan) and print them up. Be sure that each call tab is spaced far enough apart from the next so that you can cut them out. If you wish you may use the inversion feature found on most graphic programs, allowing you to make the letters white and the background black. Printing these will give you white or colored letters, depending on the paper selected, on a black background. If the paper is thin enough or the light is bright enough, these may even work on radios with back-lit push buttons. Before cutting out the push button tabs, give the page area where the tabs are located several coats of clear varnish until a plastic appearance is obtained. If you do not wish to have a glossy finish, one coat will do, which will waterproof the letters (if using an ink jet printer). The varnish will yellow slightly with time.
As for wood working, I am a complete amateur. It requires imagination, patience, and care. Sand with the grain. Start somewhat coarse (150 to 200) and work finer. Do not skip numbers. You must be able to cut new veneer so that it has a very square edge. You must get to know woods so that you can match them (most radios use a lot of walnut). Injecting glue into plywood that has separated may be done in any practical way you can imagine. Using a syrringe works. Injecting the glue by placing the glue bottle up to the plywood works. Using boards and clamps, the wood can be pressed together. Round corners are a bit more difficult to solidify, but it is possible. Use your imagination. Don't buy a radio with missing pieces that must be formed with routers and such unless you own these tools. Reconstruction is possible, but only if you want or have the tools. A lot of radios use colored varnish over "cheap" (featureless) wood. You can come up with colored varnish of the shade you desire by mixing in oil based paste stains. Some good woodworking stores sell colored varnish. Sometimes paint will work, too, but it is more opaque than colored varnish.
Get books on cabinet restoration (www.tubesandmore.com).
Don't let the hobby suck up your savings account.
Thomas