![]() ![]() I installed that the in the v-3 socket and got voltage readings through about 10 vdc lower than before.Īnyway, my immediate problem is to get fm output. I did have a similar looking tube with no identifying marks. Not sure if that is something that happens to old stock tubes. Perhaps I mishandled the tube, but it did work for a while before I discovered it cracked. I purchased it, along with c-2 and some dial cord from an antique radio supplier. I was looking at the tuner over the weekend and noticed that the newly replaced tube, v-3, 6AB4, was broken. Get it as soon as Sunday, Jul 24 FREE Shipping on orders over 25 shipped by Amazon. The pencil notations on the schematic are my readings with the two replacements installed. Cable Matters 10-Pack Low Profile 2-Port Keystone Jack Wall Plate in White. C-1 - a two cap canister – is a replacement and seems ok. I’ve attached a few pages from the Sam’s Photofact.Īs noted, I replaced v-3 and c-2. If possible, I would like to establish fm reception before I get too deep into any further restoration. I would appreciate any advice on how to proceed. However, all readings were measurably higher than spec. In both the am and fm circuits, I found strong readings at each tube (fm and am). Finally, with the two new components installed, I took voltage readings – vdc relative to ground. But that produced no difference: still strong am, no fm. (There is a two cap canister around the rectifier that is a replacement and seems to be working.) So I ordered and replaced both questionable parts. Also, visually, I could only identify one cap as an electrolytic, so I pulled and tested it and found it bad. I got hold of a Sam’s schematic and checked to see if the tubes were correct one tube, the fm mixer, was incorrect. The wood case is probably restorable, the dial plate glass and chrome surround are both very nice.Īfter cleanup, without any adjustment or component replacement, it had strong am output, but no fm (I do get a hum through the fm circuit at a high volume setting). Several weeks ago I found an old Bogen R-640-G tuner (ca 1955-1956). I’m a hobbyist at best but I enjoy digging into old components and, on rare occasion, I actually fix something. Our team is ready to help, call 80 today to get started. Bogen incorporates a digital PLL synthesized tuner for precise reception of AM and FM signals. My interests are largely centered on vintage audio gear: late 60’s through early 80’s. Bogen’s AM-FM Tuners are a great addition for any buildings paging system using commercial grade digital tuners to provide background music to sound systems of all sizes. ![]()
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