VAGC-1
VIDEO AGC BOARD with
 Black Level Clamp & 6dB amp

 

 


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This useful and very versatile audio agc/limiter board allows full control over the audio and is useful in noisy environments. Gain is fully adjustable and operates on a wide range of input levels. Either use an electret microphone or pot down a line input. CQTV 243 .


 

 

 

COMPONENTS PRICE BATC MEMBERS STOCK LEVEL NOTES
Blank PCB only
£1.99
£1.59
FAIR
         

AFAGC-1
AUDIO/MICROPHONE
LIMITER/COMPRESSOR BOARD

AUDIO PROJECTS

CQTV 235 ARTICLE.
PCB Boards & some parts available here. Over 300 pcbs already sold Worldwide.

         LOCAL OSCILLATOR PCB by G8BYI

Using the ADF4360-x series of PLL / VCOs. Ideal as local oscillator for the DigiLite series.
The ADF4360-x family of phase locked loops contain a vco that over the 9-device family covers  0.1MHz to 2.750GHz. You have to select the device and software to cover your specific frequency range. Details on his website...
 

www.gb3ut.co.uk/adf4360.htm
    NOW IN STOCK:
Commercially manufactured low cost plug-in
DIGILITE NYQUIST PLUG-IN SINGLE/DUAL SYMBOL RATE
FILTER BOARDS.
 See DIGILITE section of the Projects Price List.
Download a pdf copy of the June 2016 CQTV article here.

 

 

 

Video amplifier board with optional AGC and black level clamp with 0dB or 6dB gain setting. Getting a good stable video level is more important on a digital system, Attenuator pads are available if required to trim 75 ohm input and output levels to suit various situations. CQTV 244

 

 

 

 

COMPONENTS PRICE BATC MEMBER STOCK LEVEL NOTES
Blank PCB only
£2.98
£2.80
LOW
MAX7452 IC ( 1 per board ordered)
£4.75
£4.75
LOW
Stock level now very low.
 

 


Homebrew digital serialiser & modulator.
Use on 70cms or 23cm ATV.
Full CQTV article : click here

 

 

 

COMPONENTS PRICE BATC MEMBER STOCK LEVEL NOTES
PCB only LAST FEW LEFT-FINAL STOCK
£10.50
£10.00
LOW
Free Nyquist filter board with each DigiLite pcb order
IC2 (dsPIC33FJ128GP802) Pre-programmed latest version
£6.00
£5.59
GOOD
Input balun
£1.89
£1.50
LOW
*NEW SINGLE/DUAL SYMBOL RATE NYQUIST FILTER BOARD See item on this page..
£1.09
£0.99
LOW
  
L2,L4 ( =LF2,LF6 ) 6.8uH 5% 1210 SMD
20p
19p
FAIR
         
OTHER PARTS SUPPLIERS you might need...
dsPIC33FJ128GP802 IC2 Unprogrammed. Farnell: 1676257
FT2232H Dual USB interface. Farnell: 1697465
Balun available from DigiKey or Mouser www.mouser.co.uk
Local Osc pcb either 437MHz or 1249MHz
Ebay :UltramTech or www.gb3ut.co.uk or see CQTV253

A small control board allowing step or continuous tuning control for the fixed frequency local oscillator by Ultram. (ADF4360) Choice of using 5 preset frequencies with leds for display or for continuous tuning LCD 2x 20 chars display.
(Different software for each)
COMPONENTS
PRICE
BATC MEMBER
STOCK LEVEL
NOTES
PCB only
£2.25
£2.09
GOOD
Programmed IC PIC16F628A-IS/0
£3.00
£2.60
NONE
for LED display
Programmed IC PIC16F628A-IS/0
£3.00
£2.60
NONE
for LCD display
BYI-1
G8BYI LOCAL OSCILLATOR CONTROL PCB

 

ORDERING Please email me with details of what you want and I will reply by return with a total price for you   g8ajn.tv@gmail.com
   
POSTAGE
UK:  £1 p&p per UK order, regardless of number of items.
Europe: £ 2.50 per order.
Overseas P&P enquire.
       
If you use PayPal please send payment as a 'gift' or I will get charged 80p! Make sure you supply your address to me by email as it will not appear on the PayPal receipt. Include your BATC membership number if claiming the BATC discount.
Send orders and make PayPal payment to...g8ajn.tv@gmail.com
  
Updated 29/April/2017
       
To place an order please email me with details of what you require and I will confirm the price by return. Order with PayPal using g8ajn.tv@gmail.com
Stock items are usually despatched the next day after payment received.
AB1.2
AUDIO BOOSTER
DUAL CHANNEL
Boost any audio line below 1V pk-pk up to >4V pk-pk.
Adjustable gain . Low-noise. Option for onboard 5v regulator.
Two discrete transistors per channel. Tiny board, tiny price.
At this price why not keep one on the shelf to add to any circuit lacking sufficient audio level.
Ideal for lifting electret microphone output level.









COMPONENTS PRICE BATC MEMBERS STOCK LEVEL NOTES
Blank PCB only
£1.00
£0.90
GOOD
In stock
         
LOCAL OSCILLATOR for DIGILITE.
There are several ADF4351 local oscillator options in CQTV 253.
One is an 8 preset channel PIC version, or a single frequency, the other uses an Arduino for full control.
Please note that bandpass filters are required esp. on 70cms.
Ebay supplier here.