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The MN-75 schematic doesn't assign labels to any of the switches (or anything, for that matter). The MN-4C uses S3A/B/C to address the individual wafers on the bandswitch. The antenna switch is S4

Mark, Read the details on the page I referred to: This first section deals with inexpensive general purpose relays you can use for low to medium power through 220MHz, up to about 200w. The second

Coming ?to Hamvention?

Jerry; I don't have a MN-4C tuner myself, but I found some pictures of the BAND Switch. The sections shown on the schematic are actually two different wafers. I suspect having the sections on

Is there a standard for the lettering of switch wafers? In other words - is wafer "A" closest to the panel that the switch is fastened to? Or is it the furthest out? - Jerry, KF6VB

Yes Mike does not have the rebuild kits anymore. I was able to remove the switches and thoroughly cleaned them and checked connections, they now work fine. Still unable to key.? Stdby and Oper seem

There is a article on the Drake Webpage with an explanation on how to build one. Good luck finding one. Wayne ________________________________ Sent: Sunday, May 5, 2024 1:35 PM To:

I am looking for a ?Drake 1544 adapter which allows the RV-75 to be connected to the R7 receiver? ?If you have one available, pleas let me know. ?Thanks, Tom KF5WBS

Hello to the group. I am looking for the L-4B and L7 cabinets and their matching power supply cabinets. If you have amps and their power supplies I would also consider these. Thank you for your

I use a pair of Alpha Delta switches at one of my operating positions. Yes I have to sequence them properly as I am dealing with a 630m transverter, an Acom 1000 amp and a 6m Yagi that can also be

Karl - Email sent to your QRZ.com email address. Jerry, N4JL Get Outlook for Android<https://aka.ms/AAb9ysg> ________________________________ Sent: Sunday, May 5, 2024 8:06:45 AM To:

Hi Jerry, thank you for? your nice offer. Can we talk outside 'groups.io' to discuss this matter in? more detail? I've found you on QRZ.COM, but your email address does not work for me due to

GM Folks, When using my 2-B on CW, I am hearing a *very* slight rough tone to the received CW note when in FAST AVC. Switching to SLOW AVC seems to clear up the note to where it sounds very clean and

If the pilot lamps are lit the relay should pull when you ground the key line and the amp is not in Standby. I don't think ke9pq has the rebuild kits anymore for the SSB/CW/Power switch. If you tear

Those are Schadow switches and yes, they are what was used in the TR7/R7. They can become intermittent over time. There is a subculture built up around maintaining Schadow switches in audio gear. 73

It also appears that the SSB/CW switch has failed, along with the Power Switch. It is always on if plugged in. Unable to switch between CW and SSB. Seems to be frozen in SSB.? So now I also need the

Robert; Lyndon wants to be able to bypass a 6M antenna tuner he's working on. He wouldn't be able to do that with the single-pole Alpha-Delta coax switches unless he used a pair of them, and switched

I use a 4-port AD on HF and a 2-port on 2M, both with excellent results at 125 watts. Bob, NZ5A

I am looking for one of the switches used on the front panel. Standby/Oper along with one of the bulbs used for those switches.? I believe the Stdby switch does not make all the time to Oper. so the

Lyndon; There is a "bypass" function on the Drake MN-4C tuner, but it isn't part of the 4-position (actually, 5-position) "ANT" switch. It's actually implemented with the "DIRECT" position of the