Sb 220 6 meter conversion. Reviews For: King Conversions 6 meter amps Category: Amplifiers: RF Power - 6M/VHF/UHF+ eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. Contesting During a Pandemic. com. CW Position (Power Switch) 80 Watts of Drive gave 700 Watts output. Our conversion produces a 6-meter- only amplifier; the unit is far simpler, more efficient and couldn't be more stable — and that's what we wanted. Converting a Heathkit SB-220 Amplifier to 6 Meters by Mikhail Chirkov UN8GC, Steve Gilbert K1SG, and John McManus W1JJ April 2008 QST pp. Basically you don’t need a “big bang” in the middle of a ferocious run on 20M. A vernier drive was added to the tuning control--that is really needed on 10 and 15 meters! There are many good conversion candidates available with various Heathkit SB series being the most popular due to cost and ready availability. I used the April, 2008 QST article as a guide, with a couple of small changes that I discussed with the Author (s). Would someone please give me a page number? Tnx; 73 rob / k5uj SB-220 1 Finished the SB-220 6 meter conversion, but it seems to have major parasitic oscillations. A partial view of the schematic diagram is shown in Fig. 'Six-Meter Conversion of the Heathkit SB200 Linear Amplifier', November 1971 Ham Radio (now defunct). html Improvements to Using the Heath SB-200 Linear on Six Meters - by Ron Klimas, WZ1V 2 conversion articles have been written on this topic: 'Six-Meter Conversion of the Heathkit SB200 Linear Amplifier', November 1971 Ham Radio (now defunct). Also, explore tools to convert millimeter or inch to other length units or learn more about length conversions. My inclination is to make it very useful, i. 220 Amplifier to 6 Meters Make a big noise on the "magic band" with that old amplifier. Here are the details on converting the highly popular Heathkit SB-220 to work on the magic band, 6M! For Sale: King Conversion 6-meter amp on a SB220 base. > Subject: [Amps] SB-200 6 meter conversion > > I just wanted to report that I have been almost successful at converting > my SB-200 with 572B's to 6 meters. Here are the details on converting the highly popular Heathkit SB-220 to work on the magic band, 6M! W5PR--CHUCK “…Great use for an SB-220. proes › Amplifiers › sb. YouTube - King Conversions SB 220 Monoband 6M Lou Donates An Amp Conversion to ARRL! I just wanted to report that I have been almost successful at converting my SB-200 with 572B's to 6 meters. I have to do some antenna maintenance before I am comfortable attempting full power tests on the other bands, but early tests inspire confidence on 20, 15, and 10 meters. King Conversions took my Heath SB220 and converted it to a 6-meter linear amplifier. Complete specs and Load Instructions come with the amp. Classified: FOR SALE: SB-220 6 METER CONVERSION Removed PRICE REDUCED TO $650 I have an SB-220 for sale that I converted to 6 Meters. I performed the following actions: 1. groups. 24 CONVERTING A HEATHKIT SB AMPLIFIER TO 6 METERS. The SB-200 uses a pair of 572B tubes, which can put out a nice solid signal approaching 600 watts (output) with 100 watts of drive on CW. Are you sure you wish to delete this message from the message archives of main@Heathkit-Radios. For this article, we will assume that you already have an SB-220 or SB-221. net > To: Amps@contesting. all-audio. I might have a shot at picking one up for a reasonably price. I can do Looking for feedback on "What's it worth" for my Heathkit SB-220 which was purchased with the 6 Meter conversion I have owned this Amp since 1995 in Nice Condition Subject: Re: [Amps] SB-200 6 meter conversion the 572b tube is not rated to operate on 6 meters, the sb220 would be a better choice. I'm also hoping the > signal is clean - I don't have an analyzer. The SB-220 RF Amplifier: The SB-220 (Figure 1) was released in late 1969, about six years after the SB-200. I originally wanted to replace the tube with a GI-7B (and still may do so), but decided that I should give it the effort to at least try the 572's to "see what happens". > Subject: [Amps] Tube choice for SB-200 on 6 meters > > >> Hello group, >> >> I'm looking for some information on converting an SB-200 to 6 meters. Contact me for prices. Functionally they're almost iden- tical, other than the added complexity of the 10 meter bandswitch position in the '220. substitute 6M for 10M. [6]. Changed 10 meter input tank capacitor C35 to Jun 27, 2025 ยท Ham - King Conversion: Heathkit SB-220 Transformed for 6 Meters The King Conversion is a legendary modification that transforms the classic Heathkit SB-220 HF linear amplifier into a powerful, full-legal-limit 6-meter amplifier. . e. AG4W Tells the Story of How. >> It looks like I can only use one tube due to power supply limitations. After a long surfing on the web, I wasn't able to find any dedicated article or complete and tested suggestions to support my target. I also gleaned several tips from other sources. The millimeter [mm] to inch [in] conversion table and conversion steps are also listed. Testing of SB220 converted for six meter operation Our conversion produces a 6-meter- only amplifier; the unit is far simpler, more efficient and couldn't be more stable — and that's what we wanted. I ran some tests on my conversion of an SB-220 to 6 Meters and got the following. SB-220 Heathkit amplifier with professional conversion (King Conversions) for a 6 meter Kilowatt unit. On 6/06/2020 11:10 am, Artek Manuals wrote: I have enough HF amps here (four at last count) One of them is an ancient SB-220 , so I thought what the heck I would "hack" it and turn it into a 6M single band. Our conversion produces a 6-meter- only amplifier; the unit is far simpler, more efficient and couldn't be more stable — and that's what we wanted. He does not really care if it is single band or not. qroking. I >> originally thought about using the Russian GI-7B tube, but now I'm not >> sure. Manager Reviews Home Reviews For: King Conversions 6 meter amps Category: Amplifiers: RF Power - 6M/VHF/UHF+ eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. 5 KW Dummy LOad. Repositioned plate coil tap on 10 meter position to 1 2/3 turns from C55 Tune capacitor. $1,100 plus shipping and insurance from Dallas TX Our conversion produces a 6-meter- only amplifier; the unit is far simpler, more efficient and couldn't be more stable - and that's what we wanted. The plate choke needs to be changed, I was thinking about that one with the different windings from RF Parts. If you can hear it, you can work it. What brings you to the conclusion that its a parasitic oscillation? Have you measured the frequency? It sounds more like the amp is simply taking off, in which case, no Our conversion produces a 6-meter- only amplifier; the unit is far simpler, more efficient and couldn't be more stable — and that's what we wanted. It has way too many turns to be inductive at 6 meters. I have a conversion plan on the HM, where you put a resistor in series and one in parallel with it. I originally wanted to replace the tube > with a GI-7B (and still may do so), but decided that I should give it the > effort to at least try the 572's to "see what happens". Believe me, about 20 turns of #22 wire will get you there but double spaced wound on a 3/4 inch diameter Teflon rod. Guess some on-the-air testing > is > needed during off-season. For this arücle, we will assume that you already have an SB-220 or SB-221. Complete with mods installed by King Conversions including the Soft Key interface. Originally designed for 80–10 meters, the SB-220 has long been praised for its rugged design and affordability. They both continued in production in their modified state until 1983. If ad is up the parts or some of the parts are still available. I used the 10 meter position on the amplifier. I removed several plates from the tune cap and at the moment, I have a jumper on the output coil at the 1 turn mark The Heathkit SB-220 is still being tested, but it does put out a solid 1300+ watts on 40 and 80 meters, where it will be used the most. Wired for 220V. YouTube - King Conversions SB 220 Monoband 6M Lou Donates An Amp Conversion to ARRL! [Amps] Heath SB-220 6 Meter Conversion Question I recently modified my Heathkit SB-220 Amplifier to operate on 6 meters. Right now our core stock of SB 220s is VERY low; you are encouraged to send your SB 220 to us for conversion You can also send me an email to check on current stock Send Lou an email by clicking on the King Conversions logo below. Heathkit SB-220 converted to 6 meters by King Conversions. K6JCA did this to a SB meter. Instant free online tool for millimeter to inch conversion or vice versa. Functionally they're almost iden- tical, other than the added complexity of the 10 meter bandswitch posifion in the '220. METER CONTEST. Subject: Re: [Amps] SB-220 6 meter conversion parasites Message-ID: <55A8367B. 38-40. com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi Steve. Make noise and heat the ether with this true 1KW amplifier. "Mick" McManus, WIJJ, and Mike Chirkov, UN8GC I'd like to convert my old SB-220 into a 6meter monoband amp. The amplifier is in good condition and puts out over 1200 watts with 100 watts drive. Heathkit SB-200 Amplifier 6-Meter Conversion Heathkit SB-200 Amplifier 6-Meter Conversion: The original Heathkit SB-200 Amplifier was an 80 through 10 meter amplifier that sold for around $400 as a kit. >> What. 3. If you have a catastrophe, either by inexperienced ops working with gear that has the potential to take out power panels or an amplifier spontaneously does a nasty and fills the air with ozone and lightning, you need Date 1 - 12 of 12 SB-221 conversion for 10 meters Soft Start is probably a waste in the SB-220, but it does help with the power switch longevity. …I love mine…first outing was a first place finish in CQWW VHF single band 6 meters!…” WW2DX--LEE “…Professional, meticulous, and fair…Lou’s work and craftsmanship is second to none…Life is just much easier when you are dealing with someone who knows what they are doing…” SOLD! Heathkit SB-220 converted to 6 meters by King Conversions. The SB-220 originally sold for a fac-tory catalog price of $349. Both remained on the market until 1978 when 10-meter capability was eliminated. The easiest but not the most cost effective or educational way of increasing power on 160 meters is: sell the old 80 through 10 meter amplifier and purchase a new model that has 160 meters included. The amp is set for 240 VAC, uses maximum drive power of 100w, has CW output of 1000w (recommended) and 1400w PEP on SSB. Does anyone know what's involved in doing the conversion or better yet someone i can ship to have it done? I read its almost the same thing as the SB 220 model. Hi, I am unable to locate any article on a SB220 6 meter conversion in this month's (April) QST. And yes it's for 11 meters but in a nice guy on the free bands. 95. Steve Gilbert, KISG; John J. io? This cannot be undone. The Heathkit SB, two Z, amplifier made a notable impact in the to be in the grid-current position, the meter can also be crispy-crittered. bill nj2s > From: n1miw@cox. A little background - I basically followed the 2008 QST article, except I have the original relay in it. 6080100@bigpond. Here I show the installation of 2 Harbach kits and repairs of a sb200 that was modified for 6 meters CONVERTING HF AMPS TO 6 METERS - OUR EXPERIENCE: Many popular HF amps lend themselves very well to conversion The most popular and best performing all around amplifier for conversion is the Heathkit SB-220/1 series Other units that convert well are the Amp Supply LK-500 and LK-450, Heathkit SB-1000 and the Ameritron AL-80, AL-80A, and AL-80B Manager Reviews Home Reviews For: King Conversions 6 meter amps Category: Amplifiers: RF Power - 6M/VHF/UHF+ eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. Parts salvaged from a Heath SB 220 6 meter conversion. i have a sb200 with a gi7b tube that some one started to mod and gave up, this fall i will finish it. The work was excellent. By Andy Blank, N2NT. No more HF! 'Using the Heath SB-200 Linear on Six Meters', January 1969 QST. For more information on King Conversions: www. 2. This described converting the SB-200 to a single band amplifier by installing an efficient new 6 meter plate tank coil and tune/load capacitors. com > Date: Sat, 8 Aug 2009 22:34:18 -0400 Reviews For: Heathkit SB-220/SB-221 Category: Amplifiers: RF Power - HF & HF+6M eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. King has been making these professional conversions for SB-220 and other amplifiers for years, Look at details on www. pro › Comm › all-audio. I think Manager Reviews Home Reviews For: King Conversions 6 meter amps Category: Amplifiers: RF Power - 6M/VHF/UHF+ eMail Subscription Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. No category SB 200 Mod for 6 meters WZ1V SB 200 Mod for 6 meters WZ1V http://www. These were key down tests, Bird 43 on output and Motorola on Input, into a Bird 2. The Heath SB-220 amplifier can be converted for use on the 6-meter band by changing only a few components. I know the suppressors need to changed (??? any info on that would be appreciated) 2. > > One quick question for you guys who are running modified 6 meter amps - > does the amplifier draw more line current after the mod? Subject: Re: [Amps] SB-200 6 meter conversion the 572b tube is not rated to operate on 6 meters, the sb220 would be a better choice. The amplifier is in good condition and puts out 1200 watts with 100 watts drive. com/sb200mod. Converting a Heathkit SB. Hello, I have been tasked to convert an SB-220 for a friend. Part 1 Mileage may vary but this is how I modified my SB-220 for use during major contests. 1. newsvhf. Other brands & models include Ameritron, Dentron, Collins, Drake, Amp Supply, Hunter, Henry, Alpha, Tokyo High Power, Yaesu and more. I chose to convert my old SB-220 to include 160 meters and pocket the knowledge and experience plus the roughly 600 dollar difference. com > Date: Sat, 8 Aug 2009 22:34:18 -0400 It has way too many turns to be inductive at 6 meters. dg3i, nmrb, nh20xi, pepi, jcxqj2, 9ubmj, bzkng, qebhez, p0jaz, nnhq,