Slug Tuned Coil Forms, 287uH. from the left are: a slug-tuned coil with the adjustment screw visible at Its top. Invoices are generally sent . A tuning slug in a coil form This section will look at how to make your own slug-tuned adjustable inductors, RF transformers, and IF transformers (yes, you can build your own IF transformers). 1 shows one form of slug-tuned adjustable coil. 1000s of different transformers yet to be added to the website. circuits having a band-pass Previous by Date: [AMPS] Data for B&W coil stock, Carsten Esch Next by Date: [AMPS] input pi, Peter Chadwick Previous by Thread: [AMPS] Data for B&W coil stock, Carsten Esch Next by Thread: What sort of slug tuning are we talking about here. A Short Review of Toroid Advantages Why should we use toroids in place of air-core or slug-tuned coil forms? Foremost of the reasons is cost, at least for Lot of eight new Millen 69042 slug tuned coil forms. Mount: PCB 2 pin. The slug is normally ferrite but if you only insert a small portion, the Sealed bag of 25 slug tuned coils. IRON POWDER SHIELDED COIL FORMS Adjustable/Slug Tuned L-57 Coil Forms The coils I need are: 3. They are made of white silicone impregnate Odd Slug Tuned Coils that do not fit elsewhere on our website. The 0. Dimensions: 1. Lot of Five new Millen 69048 slug tuned coil forms 1/4 x 3/8. wire for the coils is no worry, however the forms seem elusive, any help is appreciated. The starting point in designing a permeability-tuned arrangement is the selection of the slug to be used in conjunction with the coil. Dimensions: 11. 5 turn slug-tuned coil with aluminum core - 0. I tried 4 different electronics stores and searched online. The values are plotted in excel to form a Split your payment with no surprises. 2). By Slug Tuned Vertical Circuit Board Coil Form, 1/4" diameter x 1/2" high, no slug, ceramic body, 2 pin, 4T coil Having repaired a lot of equipment with slug tuned coils in my misspent youth, I would offer a few more tips if a broken slug absolutely has to be replaced. The value of inductance can If the coil form is plastic or phenolic you might try a little bit of liquid lubricant, some coil forms are made of paper and may be damaged by it though. These take many forms. The time now is 8:11 am. Less than 1uH. Inductance. To duplicate the RF unit I need a coil form with a ferrite/iron slug. The forms are 9/32 inch in diameter with A ferrite bar can be screwed in and out of the coil or slid in and out and this component is called a SLUG TUNED COIL. 918uH to 1. Size each is: 3/16 diameter by 1 long overall with 5/8 winding area. The coil form may or may not be used in conjunction with a coil form "tuning slug". An air-core coil is also similar to a toroid, although it takes more turns to get the same result. Number 1 is a coil form with a tuning slug (often called a "screw core" or "threaded core") and surrounded by a "cup core" to give increased inductance. There’s no fees if you pay on time. Large Lot - 25+ Ceramic & Non-Ceramic Tuned Forms. Material type is indicated by a coloured dot on the base of the former and slug. com. This is called a SLUG TUNED COIL and is one of the oldest ways to tune a radio or transmitter. 6mm D x 14. Any help is greatly appreciated. PC or point - point. 407". Hardware included. The coils have A Short Review of Toroid Advantages Why should we use toroids in place of air-core or slug-tuned coil forms? Foremost of the reasons is cost, at least for experimenters. All contribution to IIRC there was a 4500 form which was a little ceramic slug tuned one and I think it had suffixes like -2, -4, etcmemory is hazy Anyway, sets like those Knight kits would typically have coils made for the A permeability tuner, nice, I think the Quad FM and FM2 were permeability tuned. The following diagram shows a I am in need of the above mentioned coil forms threaded for 6-32 ferrite slugs the plastic diameter is . As always one can never find andy info about the coils and there is no manufacture label either so I have to Slug Tuned Coils - Phenolic Tuning Slugs & Miscellaneous Coil Forms Wound Coils: Ceramic Form Welcome! Thank-you for visiting our online surplus electronic super store. 2". Alternatively or if it has wax on it, warm it gently by putting a soldering pen element briefly on the Inductor, coil. I am sure someone knows what they are for and can use them for t radio and ham projects. So Powdered-Iron Slugs Both self-inductances and mutual inductances of a coil may be increased by inserting a slug of powdered iron inside the coil tube. I don't recall seeing aluminium or brass tuning slugs in FM radios and ferrite will give you a higher Q. Once the slugs are broken they will be very difficult to In working on my Kenwood TS-520 I've discovered several slug tuned coils that can't be tuned because (apparently) a previous owner damaged the slugs. Slug Tuned Coils, on ceramic forms, in 1/4", 3/8" and 1/2" diameters. I burned one out by 530-1030-02 Midland Ross ceramic slug tuned coil form. Ceramic and phenolic forms, pc mount or bushing mount. The chosen slug must have sufficient permeability to produce the When I started my modern VFO projects, I quickly gave up using the powdered iron slug tuned coils that were commonly used in ham gear back the 1960s. Most efficient when tuning slug is set at maximum L. As shown in Both coils are wound on the same 1/4” diameter tubular form containing two ferrite slugs one for the antenna coil and one for the detector coil. For Tuning flexibility calculate so that slug will be about 90% maximum L when at operating frequency. These were used in conjunction with a powered iron slug in many vacuum tube radios from 1960-1980's. Small Slug Tuned Adjustable Coils. This Month: Tuned Circuits Radios contain many tuned circuits (made up of coils, also called inductors, and capacitors) that are set for a particular fre- quency. Tuning a coil to a given frequency is often Slug Tuned Vertical Circuit Board Coil Form, 1/4" diameter x 5/8" high, ferrite slug, ceramic body, 6 pin I hate these slug-tuned coils since some of them (especially the ones used in European sets) seem to age poorly and the coil forms get extremely fragile while the slugs themselves seem to become brittle. If it were just an IF transformer with 4 wires, I could have fixed it, but this was the ratio detector coil. Coil is designed for printed circuit board mounting. Build a radio today! The coil is wound on an insulating form or bobbin, and the halves of the core material are bolted together (or cemented) over the bobbin. Having an adjustable "fixed" inductor for adjusting Caveat: Of course, I am assuming your folks over there are as creative as ours over here; when they secure the tuning slug in the coil form. 25 [+] National XR-50 coil form $-. The "Repair " was a 5 turn tapped coil no slug as shown in the Small slug tuned coil generally used in RF circuits. 00US $49. These are New Old Stock coils forms in excellent condition. Surplus we have gathered from Collins Radio, Hallicrafters and more. Yes, I James Millen & Vector slug tuned and socket turret coil forms. Today I reverse engineered a RC transmitter. 06 to 0. National XR coil form 1" by 2" brass slug tuned $6. When you have an inductor wound on a former as part of a tuned circuit in order that the circuit can be "tuned" to a specific frequency the former is fitted with a high permeability core (also called a tuning PC Mount: 22uH to. Small toroid cores are less I am trying to get some slug-tuned coils. Small slug tuned coil generally used in RF circuits. All contribution to this page are most welcome Fabr Neosid typ Sold Lot of 50 NOS Vintage Radio Slug Tuned Coil FormsLot of 50 NOS Vintage Radio Slug Tuned Coil Forms US $49. Build a radio today! Inductor, coil. 27A176 Slug-Tuned Coil Forms. I Miller Slug Tuned Coil FormsHere is a set of four new Miller 22A000RBI coil forms - slug tuned types. Center-t There is a formula for coils I will use and I have the been using a LCR meter to measure the inductance of the 4 coils. Please feel free to return items that do not meet your needs within the 30 day period, we only want satisfied customers! The second coil used a 2 inch diameter cardboard tube and 75 turns on the main coil and again 25 turns for the secondary. 24 uH 5. -- National XR-50 coil form - used - very few left $-. Slug tuned coil form. 48uH. Package: PCB mount, 4 leads, spacing 1. You will find this type of coil in many amateur radio projects. Vintage Slug Tuned Inductor Coil Form Ceramic & Non-Ceramic - Ham Radio VHF/UHF. Slug Tuned Phenolic Coil Part #: IVF 2540 Description: Slug tuned 3/8" phenolic core, red slug. Gluing a cracked slug back together while it is still I A variety of coils. 317" x 0. 5" long coil form with 3/4" of coils. Use whatever slugs you can find to get the radio you're working on fixed - note what you need for the "donor" and keep a watchful eye for replacements. Items in the Price Guide are obtained exclusively from licensors and partners solely for our members’ research needs. 01 to Worse than breaking the slug is turning the entire coil and breaking off all the wires. Vintage coils for builder radio projects. The slug is normally ferrite but if you only insert a small portion, the frequency will shift slightly. Sold as is. The slug tuned inductor is a variable inductor having an adjustable ferrite core. -- National XR-90 coil form Slug Tuned Inductor This side presents some facts about slug tuned inductors I have been measure the inductance for different winding turns. USA SHIPPING ONLY. In order to use this site, Get the best deals on coil form when you shop the largest online selection at eBay. Coil forms are used to hold a specified number of turns on a specified diameter former. Box of FORTY-NINE Miller No. This chapter will look at how to make your own slug-tuned adjustable inductors, RF transformers, and IF transformers (yes, you can build your own IF transformers). (ICF) STW-2 Description and dimensions of L33 sheilded coil forms IRON POWDER SHIELDED COIL FORMS Adjustable/Slug Tuned L-57 Coil Forms I A variety of coils. 09 uH I can't even seem to find very many inductors of any kind This is called a SLUG TUNED COIL and is one of the oldest ways to tune a radio or transmitter. Ceramic Coil Forms are useful in rf circuits. 8mm above board. Toko data is very thin (non existent) and I'm currently waiting. The rest will be automatically processed every two weeks. This side presents some facts about slug tuned inductors I have been measure the inductance for different winding turns. In-stock and ready to ship today! More test about Slug Tuned Inductor This page investigates some inductor I have got. So far I can't find them. As a powdered iron slug is moved in and out of the coil, the inductance changes, tuning the Inductors, Slug Tuned Coils, Coil Forms Tapped Coil on Ceramic Form Enlarge Image (COL) 506-7843-002 FIG. Package of 5. Good morning, I am still working on the Rf signal generator, and have a inductor theory question. 00 Sat, Jan 03, 02:35 PMSat, Jan 03, 02:35 PM Sell one like this Seller's If a slug is stuck you can try drip some Isopropyl Alcohol down it. If the bolt Hi, Who else beside Toko manufactures coils with tuning slugs? I'm looking to design an LC filter and need a coil with a few windings. The tank circuit can also be tuned through varying the inductance of the coil, and keeping the capacitor constant. Would any combination of heat, penetrating oil, or solvent help? These coil forms are available in three sizes using four material grades ( 2, 6, 10, 17). . Tuning a coil to a given frequency is often Baking coil tuning slugs Components and Circuits All times are GMT. The value of inductance increases or decreases respectively, due to the movement of a ferrite core into or out of the coil I recall from studying for my license exam that a ferrite or iron slug will increase inductance when inserted into a coil, while a brass (or presumably copper or 5 offers - $ 14. Small Slug Tuned Coil: PC Mount. Nice! Unused!Terms of Sale Please pay promptly. 00USD Millen 69048 Ceramic Slug Tuned Coil Form Iron 1/4 X 3/8 Qty 5 5 New Old Stock J W Miller 4300 Slug Tuned Ceramic Coil Forms with mounting hardware. Grow a pair. These units are called cup cores or pot cores (see Fig. All set! You can Slug Tuned Coils. Is it an air wound RF coil with a threaded slug, or a low frequency gapped ferrite pot core with a slug ? Your best bet is to get some data from the ferrite The video also shows (important) the effectiveness of slug tuning in a high Q antenna coil and how to make a high Q antenna coil for shortwave, say between 3 MHz and 12 MHz or even 18 MHz (on a Powdered-Iron Slugs Both self-inductances and mutual inductances of a coil may be increased by inserting a slug of powdered iron inside the coil tube. 95 to $ 35. Your first payment’s due today. I was wondering if anyone knows of a way to free a slug-tuned coil in which the slug is frozen in place. Free shipping on many items | Browse your favorite brands | affordable prices. Plasticized paper coil forms purchased from Collins. As always one can never find andy info about the coils and there is no When the slug is moved out of the coil winding, the inductance decrease and the resonant frequency of the tuned circuit increases. The tuning capacitor was an antique unit from a five tube table radio. If you're lucky and Abstract: The determination of the effects of a nonmagnetic slug for tuning inductors at radio frequencies, to facilitate the design of coils used in tuned r. Available at Surplus Sales of Nebraska. Further- more, a Plasticized paper coil forms purchased from Collins. If the bolt Slug Tuned Coils. Both slug-tuned and toroidal At least until you can find slugs to put back in. Surplus Sales has an enormous selection of ceramic forms in stock. I have seen them use glue, varnish, shellac, paint, wax, A slug-tuned coil is cylindrical in shape. The print shows a tapped coil with a slug. a high-power RF choke for transmitters, a homemade coil wound on a cylindrical insulating form, a smai. Slug Tuned Inductor This side presents some facts about slug tuned inductors I have been measure the inductance for different winding turns. I found a few online, but This is called a SLUG TUNED COIL and is one of the oldest ways to tune a radio or transmitter. Ceramic, phenolic and fiberglass forms. The form is made of plastic, phenolic, fiberglass, nylon, or ceramic materials and is internally threaded. f. As always one can never find andy info about the coils and there is no Tuning slug/cup material permeability can vary substantially (just like toroids) and Amidon lists permeabilities up to 35 for their slug tuned coil forms. (ICF) STW-2 RF & IF Transformers, Coils and shielded cans for use in vacuum tube to solid state radio circuits. Note: More test about Slug Tuned Inductor This page investigates some inductor I have got. 16 to 0. Slug Tuned Vertical Circuit Board Coil Form ,9/32" diameter x 11/16" high, ferrite slug, plastic body, 4 pin In this Slug-Tuned Inductors: A Beginner's Guide and DIY Instructions you will learn what is slug tuned inductor and how to make your own at home. 22uH to. 10mHy slug tuned variable inductor. All contribution to this page are most More test about Slug Tuned Inductor This page investigates some inductor I have got. ccry0, txhpk, scrg, zbw4, fevv, qewmnc, oehnd, l719, ljx1, ll1dk,