Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

AM transmitter issues
#1

Hi there,

First, let me start by saying I'm definitely more of a collector and not strong on the engineering side of things. I currently use a Spitfire AM transmitter which worked well when I was feeding it with a cheap radio/phone combo with adjustable volume. I'm now upgrading to a Garrard RC-88/4 turntable and preamp. Unfortunately, it sounds like the preamp is overpowering the transmitter even at the lowest gain setting (which is 39db). Just getting alot of distortion even after playing with various frequencies and ATU switch settings. Are there any other settings on this transmitter I can play with?

Another option is I have an SSTran AMT-3000. That has gain adjustment of its own, which would probably solve my problem. But the unit stopped working a few years back, which is why I bought the Spitfire. On the AMT-3000, it lights up but does not send out a signal. (I've also played with frequencies and settings on this unit, and it does have an antenna wire plugged in.) 

Anyone who has any thoughts on either dealing with the distortion on the Spitfire or getting the AMT-3000 playing again, would be greatly appreciated. I'm trying to avoid buying a third transmitter.

Thanks,
Steve


Messages In This Thread
AM transmitter issues - by oldschoolphotoguy - 04-15-2023, 05:39 PM
RE: AM transmitter issues - by vinzer - 04-15-2023, 07:03 PM
RE: AM transmitter issues - by MrFixr55 - 04-16-2023, 09:37 AM
RE: AM transmitter issues - by Radioroslyn - 04-16-2023, 11:02 AM
RE: AM transmitter issues - by radiorich - 04-16-2023, 01:33 PM
RE: AM transmitter issues - by oldschoolphotoguy - 04-21-2023, 04:51 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
PT-6 antenna connections
Notice in the schematic the notch at the bottom of the antenna coil is between pins 3 & 4. Yes, pin 6 of the 7C6 is...RodB — 07:34 PM
bridkarl
I have two PT-6 chassis. On both there is a blue wire that runs from the above chassis transformer to pin 6 of 7C6. So t...bridkarl — 07:23 PM
Cannot Adjust an IF Transformer’s cores
Joseph, now you are an engineer!!RodB — 06:37 PM
PT-6 antenna connections
Hi, reading your explanation I can see the confusion. If you take it one connection at a time it should result in a desi...RodB — 06:34 PM
Cannot Adjust an IF Transformer’s cores
It works! I received the PCBs this morning in the mail, and put everything together. I reused the base from the original...jrblasde — 04:32 PM
PT-6 antenna connections
I seem to have lost my way on this PT-6. I see the antenna aerial transformer schematic - I’m reading pins 1 through ...bridkarl — 12:30 PM
40-150 General questions
Good thing you're a good electrician ... the pictures show a lot of rewiring in your future! Take care and BE HEALTHY!...GarySP — 11:52 AM
40-150 General questions
I think RobB has it right. It is a part number and looks like its stamped on the chassis and that wasn't something you ...klondike98 — 11:41 AM
40-150 General questions
It's most likely a part number. Most of Philco part numbers are in that format. I looked at the parts list for this mode...RodB — 08:10 AM
40-150 General questions
Hi Kevin, No, I don't but I like your Quote about being a good electrician. The way I look at it is "The fact ...MrFixr55 — 08:06 AM

[-]
Who's Online
There are currently 3258 online users. [Complete List]
» 3 Member(s) | 3255 Guest(s)
AvatarAvatarAvatar

>