For Sale: Modulation And Audio Transformers. NOSB = New-Old-Stock-In-Original-Box.
Prices are approximate--make an offer. Stock up now for those winter projects. Thordarson 21M62A 125W Modulation Transformer. NOSB. The primary is 210 ma. and the secondary is 160 ma. series and 320 ma. parallel. Detailed specifications are in the box with the transformer. $75 UTC CVM-4 300W modulation transformer. This has new bolts on it and has been repainted. I assume it was rusty and this was done to clean it up. $125 UTC CVP-3, round case, 60W output for push-pull by 6L6, 801, 807, 5881, 1614, 1625. Used $35 Thordarson Type 7352: See catalog 400 back page. Was designed to match PA amplifier to PP transmitter input in the range of 6000-10000 ohms at 80 watts. 500 ohm input. $60 Inca N-28. This is a multimatch input and output mod TF for up to 600 watts or so. The Jones RadioTelephony book shows an 800 watt transmitter with a push-pull 100th modulator that uses this transformer. See catalog in INCA N-28 file folder. $150 Thordarson 6423. This is for 800, 830B and RK-18 plates to 5000 ohm 200ma load or 20,000 ohm 100 ma load. $40 Thordarson 21M50A Universal Modulation Transformer. NOSB. Pri & Sec 2000 to 20K ohms, 15 watts. $45 Audio Transformers Of All Types UTC A-18. Used. $10 UTC S-3. Used. $10 UTC S-8 universal driver transformers. 1 plate 2.5:1 to 2 grids 1.3:1. NOSB. $20 each. Two available. UTC S-18 used. $10 Military SCR-522 driver and modulation transformer set. Used. $10 Stancor A-3310 20W Output. NOS. No box. $20 Stancor A-3818. Used. $10 Stancor A-3830 20W Universal Output. Used. $15 Stancor A-3838. 30W Output Autotransformer. Used $20 Merit A-2920. 2.5:1 driver. NOSB. $10 Merit A-3008. 10W moduation. 10K CT to 4K-12K varitap. NOSB. $15 Thordarson T-15A74 CHT Class A interstage coupling primary 10K 2,500 single plate. Secondary 40k-10K PP grids. 1938 vintage in catalog 400AX. Used. $25 Thordarson 24S60 Outp[ut. 4 watts. Class A output NOSB with paperwork. Paperwork gives typical tube types. For example 2A5, 42, 47, 6F6, 10, 45, 71A etc. (amny more). $20 4- BP brand 70V 10W line matching transformers. NOSB with schematic on box. $5 each Thanks for looking. 73, Don Merz, N3RHT The information contained in this e-mail may be confidential and is intended solely for the use of the named addressee. Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorized. If you are not the intended recipient please notify us immediately by returning the e-mail to the originator.(16b)
