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Hi Guys I enjoy reading your comments art the commercial versions of the TR7 line as I have a TR4310 and I like to share with you a little story abt what happened when I ordered mine. I had obtained

*** Whups - that being said, I actually built a preamp into mine. No gain. Just a JFET source follower. It presents the rochelle salts element with an extremely high impedance. This helps low

*** Indeed. I don't understand why a D-104 would *need* a preamp. Maybe if you needed a couple watts out of it to directly amplitude modulate something? - Jerry, KF6VB

The D-104 with the G stand was? made for? hams back in the 1930's . CB was about 20 yeas later, I am thinking 1958.? CB did not take off to the 1960's to become popular.? ?They produced the

When Astatic came out with the D-104s, they were made for the CB market. Back then most CBr’s were on AM not SSB, so the mic works great on AM or FM, Then Astatic came out with the 10d mic (bullet

HEY ALL A lil nostalgia history of the d104 and its amp’d bases used in them CB days.. T-UG8: Came with a 4-wire cord. The audio wire is NOT disconnected from the mike on receive. This

Robert, The amplified D-104 Final Edition works fine with the TR-7 by merely bypassing the audio amp. ?It is more of a collector's item in the display case. Have a good week. 73, Evan

There are D-104’s that have no preamp. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent from [Proton Mail](https://proton.me/mail/home) for iOS

Hi Evan, Don’t worry about the photos, I since found out that’s not the correct microphone I need, so I’m no longer interested in it. As far as the D-104 goes, they are amplified which will

Robert, I also have a NIB, last production run of a D-104 that is an amplified version, in the display case. ?It is actually better than new if you'd ever want to know the story. 73, Evan

Hi Evan, Thanks for responding, how much are you asking for it, shipped to Ohio? Can you send some photos to my email: robertgromen@... <mailto:robertgromen@...> Thanks, Robert WD8PAQ

Can a 10 Meg input impedance HP DVM be used to measure these resistances? That input impedance spec is the same as what I have seen listed for some VTVMs but I have experienced a number of resistance

I have a NIB Shure 450 mic with selectable impedances. ?I'm using one with my TR-7A and getting good reports. ?Not bringing it to Hamvention for several reasons, hihi. 73, Evan, K9SQG

There is a CB style mic that Drake used with their 470 that has an excellent cartridge that sounds great on my TR-7A. ?I'll. dig up the model number if you like. 73, Evan, K9SQG

Indeed...comes from a long line of RR-1 and RR-2 variants with up to 13 different brandings including the likes of SAIT, McKay Marine, Hagenuk, Debeg (I think!) and others. One of my RR-1's actually

Robert I've used both on the TR-7 using mic pin 1 , the 404C has more "drive" than the 404B so it takes a lower mic gain setting. I believe the Drake 7077 mic was 750 Ohms imp'KE7KK

Thanks Bill, that helps a lot. I wasn't sure if it needed a high imp or a low imp? You say either works well with the TR7? Which imp were the original Drake mics? Thanks so much, Robert

The equivalent hand mic for the Shure 444 is the 404C (Hi imp) or the 404B (low imp) either works very well with the TR-7 Bill KE7KK

The devil made him do it! Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. Sent from [Proton Mail](https://proton.me/mail/home) for iOS

Hello robert, I have a lot of desk and hand mics in my QTH adds….Just search for “NU2W” and will receive all my available gear…. I cant guarantee that any of the mics will work for you,