- Small VHF Transmitter - 4 Updates
- FRANCE NEON SIGN TRANSFORMER - 4 Updates
| Three Jeeps <jjhudak4@gmail.com>: Aug 31 12:41PM -0700 > Thank you! > Peter Wieck > Melrose Park, PA A few years ago, I used an RF amp from these folks and it worked well. In the VHF range, the amps they have are relatively low power 1-3 W. Would something in that power range be sufficient? https://www.pasternack.com/medium-gain-medium-power-amplifiers-category.aspx |
| Michael_A_Terrell <terrell.michael.a@gmail.com>: Sep 01 12:34AM -0400 > Some here may know that I operate the Part-15 compliant AM & FM transmitters for the Kutztown Radio Meet. Given that vintage TVs are becoming more prevalent at the show, I would also like to operate a small VHF television transmitter featuring vintage movies and such. I see lots of stuff out there for UHF, nothing that specifically lists VHF, other than DIY stuff, for which I have neither the time nor inclination given I do not collect any sort of TV stuff. > Kit or ready-made - any suggestions? Remember, I am in the USA. Blonder Tongue and Holland agile or fixed channel modulators sell cheap on Ebay. They put out enough RF that you may not need a power amplifier. I've bought them for $15 plus shipping. R.L. Drake also built them. Pico, Microdyne and others built them for MATV headends and they are all are basically obsolete since 2009. RCA, Scientific Atlanta and Phasecom built them for CATV headends. These sold new for thousands, but there is little to no marlr them. Some can also put out their Aural carrier on the old 49 MHz FM band. You would need a trap to kill the video carrier. There are lots of five for $30 on Ebay, right now. They are without the power supply, rack and combiner, but you only need power for one of them. I don't know what channels they have left, but the seller is E-cyclePro. They often have these items. http://www.ebay.com/usr/e-cyclepro https://www.ebay.com/itm/283848841569 has one on Ch9 for $27 Holland-HPM55-Audio-Video-Modulator-Tested-Commercial If you want to drive multiple lines, there are sometimes one in, 16 out broadband distribution amplifiers for under $50. With the high output level of a MATV modulator you could use a four way splitter, each split four ways to drive up to 16 TVs without an amplifier. That would require running a lot of RG59/6/11 coax. With the amplifier you could scatter a few antennas around and use rabbit ears on the TVs with a lot less coax. I have a new, in the box Tradewind Rack Mounted Distribution Amplifier for $35, but i don't think that you really need it. -- Never piss off an Engineer! They don't get mad. They don't get even. They go for over unity! ;-) |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Sep 01 05:57AM -0700 Thank you! I am going in this direction, with thanks to a certain individual who happens to have such a device, and is willing to pass it along. Peter Wieck Melrose Park, PA |
| Michael_A_Terrell <terrell.michael.a@gmail.com>: Sep 01 12:19PM -0400 > Thank you! I am going in this direction, with thanks to a certain individual who happens to have such a device, and is willing to pass it along. See if you can find a good image of the old test pattern and burn it to a DVD. That will help people see how sharp the image really is. It will also show poor IF alignment that was done with crude Sweep/Marker generators rather that a multiburst system. Let me know if that doesn't pan out. I am familiar with a lot of brands and models of modulators. I have a nearly complete analog headend system, in storage. I just need a couple full height relay racks, and dipexers for 60 channels! :) At one time my job was to repair headend equipment for a top 100 MSO cable group. We also up linked WGN, WOR and operated the first Electronic Program Guide on a subcarrier on our WGN transponder. We also had WFMT on another WGN subcarrier. Sigh. That was 35 years ago. I did over 10,000 repairs, in four years including microwave equipment the OEMs refused to support. Never piss off an Engineer! They don't get mad. They don't get even. They go for over unity! ;-) |
| Roy Buskirk <datamatrix65@gmail.com>: Aug 31 12:18PM -0700 I have an older FRANCE PG-1 Series neon sign transformer. It is a type that contains a SCGFP potted module in top compartment of transformer. There are a number of leads originating from the potted transformer, which I am trying to identify. 3 of the leads, black, white and green, ring out as extensions from the input power posts. This is the 120 VAC supply to the unit. There are 4 remaining leads (1) blue, (1) blue with white stripe, (1) orange, (1) orange with black stripe Can anyone tell me what these 4 leads do and how to reconnect them, once the SCGFP potted module is removed. My purpose is to convert this transformer for use as a Fractal Wood Burning System Thank you - Roy |
| Trevor Wilson <trevor@rageaudio.com.au>: Sep 01 06:03AM +1000 On 1/09/2020 5:18 am, Roy Buskirk wrote: > Can anyone tell me what these 4 leads do and how to reconnect them, once the SCGFP potted module is removed. > My purpose is to convert this transformer for use as a Fractal Wood Burning System > Thank you - Roy **I doubt that it will deliver sufficient current to burn wood. Use a (couple of) microwave oven transformers. -- Trevor Wilson www.rageaudio.com.au -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
| Terry Schwartz <tschw10117@aol.com>: Aug 31 04:09PM -0700 On Monday, August 31, 2020 at 3:03:29 PM UTC-5, Trevor Wilson wrote: > -- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus Better yet, don't even try. It's super dangerous. |
| Trevor Wilson <trevor@rageaudio.com.au>: Sep 01 11:09AM +1000 On 1/09/2020 9:09 am, Terry Schwartz wrote: >> This email has been checked for viruses by Avast antivirus software. >> https://www.avast.com/antivirus > Better yet, don't even try. It's super dangerous. **Oh yeah. There is that. -- Trevor Wilson www.rageaudio.com.au |
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