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Plug the four-hole plug into its receptacle in the speaker. CORP. Lafer 1935 Production Runs. Replace out of spec resistors as necessary for proper radio operation. Rebuilding of all Philco bakelite block capacitors: With premium mylar capacitors rated 200 volts above factory specification, insuring Philco Balanced-Unit integrity: Replacement of every electrolytic filter capacitor: With new axial and radial types under the chassis. This radio never had any work done with the filter block, so I'm confident that the wiring was original. The method of identifying the lugs to which the sections are wired in the New Universal and original type bakelite condensers differs. Those capacitors tested within the specified ranges, so I decided to leave them in place for authenticity's sake. 3 - To remove traces of tar use thinner and a rag. We will identify any additional labor cost in our estimate. The Bakelite Block Capacitor One of the special challenges was the "universal bakelite capacitor." Philcos of this vintage have capacitors on the input voltage line, and those capacitors are encased in tar to keep them dry. Resistors and Capacitors. 7762-OEU has 2 capacitors in the block wired with 0.001uF between lugs 1 & 3 and 0.015uF between lugs 1 & 2 and lug 1 is ungrounded. The leftmost highlighted item in the closeup shows a typical Bakelite block capacitor. On top of the blocks are terminal strips that are riveted to the bakelite block. THIS RADIO HAS BEEN SOLD! Use good quality caps in them. There is a four-step tone control for better control over the radio's tone. 37-675 9 Philco Bakelite Block Capacitors From Chassis Clean For Rebuild L K (43.8% similar) Bid on them as is due to age. Don't let terminology confuse you….."condenser" is just an old fashioned name for "capacitor". Once the cases were clean, new capacitors were installed inside, preserving the original look of the chassis. The underside of the chassis was a mess. If we read the previous Tech Notes, we also know they are used to filter DC. In The Radio Collector's Guide to Philco Bakelite Block Condensers, Ray Bintliff has expanded greatly on my article in A.R.C., October 1989, page 8. These were phased out in the late 1930’s and were replaced by paper capacitors. Do not overheat the bakelite block, otherwise it will get bubbles. 219 Un the Philco 630 and also covers the Philco Radio-Phonograph 630PF. At times, the Bakelite blocks have either been bridged by replacements or completely removed from the set and replaced by terminal strips and new capacitors. Plays great with excellent selectivity and tone. All original Philco bakelite block capacitors were removed from the radio, their contents removed, cases cleaned, and restuffed using modern film capacitors. Receives both AM broadcast and shortwave. Fig. A beautiful, responsive, customizable, accessible (WAI-ARIA) replacement for JavaScript's popup If input parameter is set to "select" or "radio" , you can provide options. New grill cloth. These too had to be replaced. But the bakelite blocks were used in the AC line filters as late as 1948. coRP.. in the frame channel adjacent to the` specd~ ometer cable. All of the paper and electrolytic capacitors were encased in the common Philco "Bakelite Block" type cases. I left the original can capacitors installed in the chassis so that from the top, the radio looked original. With a little work, following schematic, and, parts list, you can figure out what is in them, carfully remove tar, gutt them, clean them, and, install new caps. Like my Philco Model 60, this set also uses a couple of Philco's unique "bakelite block" capacitors. Rebuilding Philco Block Capacitors Information at Chuck Schwark's website on rebuilding Philco Bakelite block capacitors Cleaning Tuning Capacitors. Philco 38-10. how to get philco information 289 "Universal Bakelite Condensers is equivalent to 7762-OEU. A stringing Two diagrams, Figs. Plays outstandingly well with good selectivity and sensitivity however this console radio was designed for and needs an outdoor external antenna to get true performance. For those not familiar with the Philco bakelite capacitor blocks, the blocks contain one or more wax paper capacitors encased in a bakelite block and partially potted in tar. The set includes a 1/4 inch plastic nut driver for aligning 1930 to 1936 Philco radios that have trimmer capacitors with a 1/4 inch nut. Beginning with run Nu. Blake went through the radio replacing the Bakelite block capacitors. 1 - A Philco Block Condenser Fig. How true that ... mainly the bakelite block capacitors and power supply electrolytics, had been replaced with individual units. 5 the grid bias arrangement for. Condenser block capacitors and capacitors built into components or a sub-chassis will cost additional. Installation comfort 2 l PHILco RADIO a TELEV. The nonmetallic tool will not detune the RF and IF circuits or short out the B+. Over time the values of the resistors change enough to affect the overall performance of the radio. They consist of a black Bakelite case in which one or two capacitors (and sometimes a resis-The capacitors are wired to the case's solder terminals and sealed in place with a tar mixture. the 78 R.F. according to Philco Service Bulletin No. All of the paper and bakelite block capacitors were stuffed with new 630 volt caps and much of the rubber wiring was replaced since it was becoming brittle. PHILCO RADIO & TELEV. If you do restorations on early Philco radios, you need this set of Philco service tools. The next issue was what to do with all the bakelite block condensers. All capacitors including electrolytics and Philco Bakelite block Caps have been replaced. Checked all of the tubes and resistors, replacing where necessary. been included. It was introduced at mid-season (January 1936). Chassis rebuilt with all new capacitors, even "restuffed" the bakelite block capacitors. You can read a little more about that type of capacitor in the Model 60's page. paper capacitors philco resistors soldering philco wiring mica & silver mica capacitors electrolytic capcitors rebuilding philco bakelite capacitors philco service bulletin no. Tubes test well. NO other cap is required in that Block or the Replacement Block suggested. 1 and 2, show these lug Bullet with broadcast and shortwave. The Bakelite knobs are original . 4 - New condensers inside the bakelite case. 2 - Melting all old tar potting compound with a hot gun to release condensers. This tone control is a specialized application, combining a switch with two capacitors, but Philco also used this technique in cases where other manufacturers used individual capacitors. No reserve. The value of these capacitors is slightly larger than the original 8uF units, but the difference won't matter in this application. Capacitors are used to block, pass, filter and tune the various currents in your radio. Fig. The Philco model 604 is a five tube AC/DC table model radio. Rebuild Bakelite capacitor(s). Two common exceptions are for rebuilding Philco bakelite block capacitors and radios requiring replacement of 50% or more of the wiring. It was described as needing “lots of TLC”. Bakelite block then ready to receive new condensers. To block AC and or noise. If you're not the best speller, a condenser, capacitar, capaciter, capacitor, condensar and condensor are also the same. The sets used either an RCA or Philco chassis until the late 1930's when the company merged with Philco and then only Philco chassis were used. Most early 1940s Philcos and Zeniths have wiring with crumbling rubber insulation; additional labor would apply for these radios. 289 - 1st page philco service bulletin no. One other bakelite block capacitor had a wire wound resistor inside in addition to a … Very solid cabinet with good finish and excellent photo grain on the front. All circuit and part number changes up to date have. This radio uses several of the capacitors enclosed in Bakelite type blocks, and sealed with a black tar like substance. Bid on these for your upcoming radio restoration work. Bakelite block capacitors deserves pass-Philco block capacitors (or "condensers") were introduced in 1930 and phased out late in the same decade. and 6A7 lst detector was changed. The Bakelite blocks were heated using a heat gun, the tar and old capacitors were removed, and modern replacements were installed inside of the blocks. Philco Black Bakelite "By Pass" con- densers, New Universal types, discon- tinued types with replacements and condensers with internal resistors. Offered are the following caps sg, sg, dg, 5287 du, 3615 dg, 6287 dg and 3793 dg. Molded Mica Capacitor Color Codes How to read the color code on molded mica capacitors Resistor Color Codes Philco T-3 Code 124 126 128 130 Transistor Radio Recap Kit Parts & Documents. Capacitors for Tube Radios and Amplifiers: . The Philco logo decal and grille cloth are modern reproduction.All of the old paper foil and wax capacitors have been replaced with modern film capacitors and every bakelite block capacitor has been rebuilt. This sheet supplements the regular bulletin No. None is broken or chipped. New solder terminal strips are added for support wherever required. This included putting sleeve insulation on the power transformer wiring: Restringing the tuning dial and capacitor was necessary since I had disassembled the chassis. DeSoto Code SE Airflow Custom-Built. PAGE 6-66 PHILCO. Unlike the RCA Victor Q10, Philco completely isolated the chassis of the 604 from the AC line. Most, if not all Philco capacitors are in bakelite blocks with tar filling. Philco started using the new Bakelite Capacitors in June of 1930 in their models 30, 41, 77, and 96. Looks great on my recently Restored Philco 37-630 Posted by David DeRosier on Aug 9th 2018 I have restored 5 different Philco Radio's and These Dials Look … It is unusual in that it has the dial and controls on top, with a Bakelite control panel mounted on a cabinet made of Walnut veneer. Back to Top. The capacitors are sealed in a black tar like substance, so a heat gun was used to soften the tar and scrape out the old caps. Restoration of a Philco Model 18 (Code 124) Cathedral Radio I purchased this radio via Trademe in November 2010. 289 - 2nd page other philco items other than radios schematics & symbols, how to use them. Standard values for the caps and resistor have to be used at 20 or 10%. I wanted to keep the chassis as original looking as possible so this required replacing the insides of the filter and Bakelite block capacitors with new caps. However, the bakelite block in this 80 Jr. Multiple wins may be combined for shipping. I used dipped radial caps as the leads on the side directed into the holes in the block terminals. Fig. I believe these may also be referred to Bathtub capacitors. Mallory had one of the broadest lines of parts used in radio receivers. 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